(ROOT (S (ADVP (ADVP (RB Once)) (PP (IN in) (NP (DT a) (JJ blue) (NN moon)))) (, ,) (NP (EX there)) (VP (VBZ is) (NP (CD one)) (PP (IN on) (NP (NP (NNP New) (NNP Year) (POS 's)) (NNP Eve)))) (. .)))
Once in a blue moon, there is one on New Year's Eve.
advmod
NumType=Mult
once
Once
ADV
RB
case
in
in
ADP
IN
det
Definite=Ind|PronType=Art
a
a
DET
DT
amod
Degree=Pos
blue
blue
ADJ
JJ
obl
Number=Sing
moon
moon
NOUN
NN
punct
,
,
PUNCT
,
expl
there
there
PRON
EX
root
Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin
be
is
VERB
VBZ
nsubj
NumForm=Word|NumType=Card
one
one
NUM
CD
case
on
on
ADP
IN
amod
Degree=Pos
New
New
ADJ
NNP
nmod:poss
Number=Sing
Year
Year
PROPN
NNP
case
's
's
PART
POS
nmod
Number=Sing
Eve
Eve
PROPN
NNP
punct
.
.
PUNCT
.
(ROOT (S (NP (NP (NNS Revelers)) (VP (VBG ringing) (PP (IN in) (NP (CD 2010))))) (VP (MD will) (VP (VB be) (VP (VBN treated) (PP (IN to) (NP (DT a) (JJ so-called) (JJ blue) (NN moon)))))) (. .)))
Revelers ringing in 2010 will be treated to a so-called blue moon.
nsubj:pass
Number=Plur
reveler
Revelers
NOUN
NNS
acl
VerbForm=Ger
ring
ringing
VERB
VBG
case
in
in
ADP
IN
obl
NumForm=Digit|NumType=Card
2010
2010
NUM
CD
aux
VerbForm=Fin
will
will
AUX
MD
aux:pass
VerbForm=Inf
be
be
AUX
VB
root
Tense=Past|VerbForm=Part|Voice=Pass
treat
treated
VERB
VBN
case
to
to
ADP
IN
det
Definite=Ind|PronType=Art
a
a
DET
DT
amod
Degree=Pos
so-called
so-called
ADJ
JJ
amod
Degree=Pos
blue
blue
ADJ
JJ
obl
Number=Sing
moon
moon
NOUN
NN
punct
.
.
PUNCT
.
(ROOT (S (PP (VBG According) (PP (IN to) (NP (JJ popular) (NN definition)))) (, ,) (NP (DT a) (JJ blue) (NN moon)) (VP (VBZ is) (NP (NP (DT the) (JJ second) (JJ full) (NN moon)) (PP (IN in) (NP (DT a) (NN month))))) (. .)))
According to popular definition, a blue moon is the second full moon in a month.
case
ExtPos=ADP|VerbForm=Ger
accord
According
VERB
VBG
fixed
to
to
ADP
IN
amod
Degree=Pos
popular
popular
ADJ
JJ
obl
Number=Sing
definition
definition
NOUN
NN
punct
,
,
PUNCT
,
det
Definite=Ind|PronType=Art
a
a
DET
DT
amod
Degree=Pos
blue
blue
ADJ
JJ
nsubj
Number=Sing
moon
moon
NOUN
NN
cop
Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin
be
is
AUX
VBZ
det
Definite=Def|PronType=Art
the
the
DET
DT
amod
Degree=Pos|NumType=Ord
second
second
ADJ
JJ
amod
Degree=Pos
full
full
ADJ
JJ
root
Number=Sing
moon
moon
NOUN
NN
case
in
in
ADP
IN
det
Definite=Ind|PronType=Art
a
a
DET
DT
obl
Number=Sing
month
month
NOUN
NN
punct
.
.
PUNCT
.
(ROOT (S (CC But) (VP (VB do) (RB n't) (VP (VB expect) (S (NP (PRP it)) (VP (TO to) (VP (VB be) (SBAR (S (ADJP (JJ blue) (, -) (NP (DT the) (NN name))) (VP (VBZ has) (NP (NP (NN nothing)) (SBAR (S (VP (TO to) (VP (VB do) (PP (IN with) (NP (NP (DT the) (NN color)) (PP (IN of) (NP (PRP$ our) (JJS closest) (JJ celestial) (NN neighbor)))))))))))))))))) (. .)))
But don't expect it to be blue - the name has nothing to do with the color of our closest celestial neighbor.
cc
but
But
CCONJ
CC
aux
Mood=Imp|VerbForm=Fin
do
do
AUX
VB
advmod
not
n't
PART
RB
root
Mood=Imp|VerbForm=Fin
expect
expect
VERB
VB
obj
Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs
it
it
PRON
PRP
mark
to
to
PART
TO
cop
VerbForm=Inf
be
be
AUX
VB
xcomp
Degree=Pos
blue
blue
ADJ
JJ
punct
-
-
PUNCT
,
det
Definite=Def|PronType=Art
the
the
DET
DT
nsubj
Number=Sing
name
name
NOUN
NN
parataxis
Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin
have
has
VERB
VBZ
obj
Number=Sing|PronType=Neg
nothing
nothing
PRON
NN
mark
to
to
PART
TO
acl
VerbForm=Inf
do
do
VERB
VB
case
with
with
ADP
IN
det
Definite=Def|PronType=Art
the
the
DET
DT
obl
Number=Sing
color
color
NOUN
NN
case
of
of
ADP
IN
nmod:poss
Case=Gen|Number=Plur|Person=1|Poss=Yes|PronType=Prs
our
our
PRON
PRP$
amod
Degree=Sup
close
closest
ADJ
JJS
amod
Degree=Pos
celestial
celestial
ADJ
JJ
nmod
Number=Sing
neighbor
neighbor
NOUN
NN
punct
.
.
PUNCT
.
(ROOT (S (NP (DT A) (JJ full) (NN moon)) (VP (VBD occurred) (PP (IN on) (NP (NNP December) (CD 2)))) (. .)))
A full moon occurred on December 2.
det
Definite=Ind|PronType=Art
a
A
DET
DT
amod
Degree=Pos
full
full
ADJ
JJ
nsubj
Number=Sing
moon
moon
NOUN
NN
root
Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin
occur
occurred
VERB
VBD
case
on
on
ADP
IN
compound
Number=Sing
December
December
PROPN
NNP
obl
NumForm=Digit|NumType=Card
2
2
NUM
CD
punct
.
.
PUNCT
.
(ROOT (S (NP (PRP It)) (VP (MD will) (VP (VB appear) (ADVP (RB again)) (PP (IN on) (NP (NNP Thursday))) (PP (IN in) (NP (NP (NN time)) (PP (IN for) (NP (NP (DT the) (NNP New) (NNP Year) (POS 's)) (NN countdown))))))) (. .)))
It will appear again on Thursday in time for the New Year's countdown.
nsubj
Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs
it
It
PRON
PRP
aux
VerbForm=Fin
will
will
AUX
MD
root
VerbForm=Inf
appear
appear
VERB
VB
advmod
again
again
ADV
RB
case
on
on
ADP
IN
obl
Number=Sing
Thursday
Thursday
PROPN
NNP
case
in
in
ADP
IN
obl
Number=Sing
time
time
NOUN
NN
case
for
for
ADP
IN
det
Definite=Def|PronType=Art
the
the
DET
DT
amod
Degree=Pos
New
New
ADJ
NNP
nmod:poss
Number=Sing
Year
Year
PROPN
NNP
case
's
's
PART
POS
nmod
Number=Sing
countdown
countdown
NOUN
NN
punct
.
.
PUNCT
.
(ROOT (NFP  ))
root
PUNCT
NFP
(ROOT (S (NP (DT The) (NP (NNP New) (NNP Year) (POS 's)) (NNP Eve) (JJ blue) (NN moon)) (VP (MD will) (VP (VB be) (ADJP (JJ visible)) (PP (IN in) (NP (DT the) (NML (NML (NNP United) (NNPS States)) (, ,) (NML (NNP Canada)) (, ,) (NML (NNP Europe)) (, ,) (NML (NNP South) (NNP America)) (CC and) (NML (NNP Africa))))))) (. .)))
The New Year's Eve blue moon will be visible in the United States, Canada, Europe, South America and Africa.
det
Definite=Def|PronType=Art
the
The
DET
DT
amod
Degree=Pos
New
New
ADJ
NNP
nmod:poss
Number=Sing
Year
Year
PROPN
NNP
case
's
's
PART
POS
compound
Number=Sing
Eve
Eve
PROPN
NNP
amod
Degree=Pos
blue
blue
ADJ
JJ
nsubj
Number=Sing
moon
moon
NOUN
NN
aux
VerbForm=Fin
will
will
AUX
MD
cop
VerbForm=Inf
be
be
AUX
VB
root
Degree=Pos
visible
visible
ADJ
JJ
case
in
in
ADP
IN
det
Definite=Def|PronType=Art
the
the
DET
DT
amod
Degree=Pos
United
United
ADJ
NNP
obl
Number=Plur
State
States
PROPN
NNPS
punct
,
,
PUNCT
,
conj
Number=Sing
Canada
Canada
PROPN
NNP
punct
,
,
PUNCT
,
conj
Number=Sing
Europe
Europe
PROPN
NNP
punct
,
,
PUNCT
,
compound
Number=Sing
South
South
PROPN
NNP
conj
Number=Sing
America
America
PROPN
NNP
cc
and
and
CCONJ
CC
conj
Number=Sing
Africa
Africa
PROPN
NNP
punct
.
.
PUNCT
.
(ROOT (S (PP (IN For) (NP (NP (NNS partygoers)) (PP (IN in) (NP (NNP Australia) (CC and) (NNP Asia))))) (, ,) (NP (DT the) (JJ full) (NN moon)) (VP (VBZ does) (RB not) (VP (VB show) (PRT (RP up)) (PP (IN until) (NP (NP (NNP New) (NNP Year) (POS 's)) (NNP Day))) (, ,) (S (VP (VBG making) (S (NP (NNP January)) (NP (NP (DT a) (NML (JJ blue) (NN moon)) (NN month)) (PP (IN for) (NP (PRP them))))))))) (. .)))
For partygoers in Australia and Asia, the full moon does not show up until New Year's Day, making January a blue moon month for them.
case
for
For
ADP
IN
obl
Number=Plur
partygoer
partygoers
NOUN
NNS
case
in
in
ADP
IN
nmod
Number=Sing
Australia
Australia
PROPN
NNP
cc
and
and
CCONJ
CC
conj
Number=Sing
Asia
Asia
PROPN
NNP
punct
,
,
PUNCT
,
det
Definite=Def|PronType=Art
the
the
DET
DT
amod
Degree=Pos
full
full
ADJ
JJ
nsubj
Number=Sing
moon
moon
NOUN
NN
aux
Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin
do
does
AUX
VBZ
advmod
not
not
PART
RB
root
VerbForm=Inf
show
show
VERB
VB
compound:prt
up
up
ADP
RP
case
until
until
ADP
IN
amod
Degree=Pos
New
New
ADJ
NNP
nmod:poss
Number=Sing
Year
Year
PROPN
NNP
case
's
's
PART
POS
obl
Number=Sing
Day
Day
PROPN
NNP
punct
,
,
PUNCT
,
advcl
VerbForm=Ger
make
making
VERB
VBG
obj
Number=Sing
January
January
PROPN
NNP
det
Definite=Ind|PronType=Art
a
a
DET
DT
amod
Degree=Pos
blue
blue
ADJ
JJ
compound
Number=Sing
moon
moon
NOUN
NN
xcomp
Number=Sing
month
month
NOUN
NN
case
for
for
ADP
IN
nmod
Case=Acc|Number=Plur|Person=3|PronType=Prs
they
them
PRON
PRP
punct
.
.
PUNCT
.
(ROOT (NFP  ))
root
PUNCT
NFP
(ROOT (S (S (NP (DT A) (JJ full) (NN moon)) (VP (VBZ occurs) (NP (DT every) (CD 29.5) (NNS days)))) (, ,) (CC and) (S (NP (JJS most) (NNS years)) (VP (VBP have) (NP (CD 12)))) (. .)))
A full moon occurs every 29.5 days, and most years have 12.
det
Definite=Ind|PronType=Art
a
A
DET
DT
amod
Degree=Pos
full
full
ADJ
JJ
nsubj
Number=Sing
moon
moon
NOUN
NN
root
Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin
occur
occurs
VERB
VBZ
det
every
every
DET
DT
nummod
NumForm=Digit|NumType=Frac
29.5
29.5
NUM
CD
obl:tmod
Number=Plur
day
days
NOUN
NNS
punct
,
,
PUNCT
,
cc
and
and
CCONJ
CC
amod
Degree=Sup
most
most
ADJ
JJS
nsubj
Number=Plur
year
years
NOUN
NNS
conj
Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin
have
have
VERB
VBP
obj
NumForm=Digit|NumType=Card
12
12
NUM
CD
punct
.
.
PUNCT
.
(ROOT (S (PP (IN On) (ADJP (NN average))) (, ,) (NP (NP (NP (DT an) (JJ extra) (JJ full) (NN moon)) (PP (IN in) (NP (NP (DT a) (NN month)) (, -) (NP (DT a) (JJ blue) (NN moon))))) (HYPH -) (VP (VBZ occurs) (NP (DT every) (CD 2.5) (NNS years)))) (. .)))
On average, an extra full moon in a month - a blue moon - occurs every 2.5 years.
case
on
On
ADP
IN
obl
Number=Sing
average
average
NOUN
NN
punct
,
,
PUNCT
,
det
Definite=Ind|PronType=Art
a
an
DET
DT
amod
Degree=Pos
extra
extra
ADJ
JJ
amod
Degree=Pos
full
full
ADJ
JJ
nsubj
Number=Sing
moon
moon
NOUN
NN
case
in
in
ADP
IN
det
Definite=Ind|PronType=Art
a
a
DET
DT
nmod
Number=Sing
month
month
NOUN
NN
punct
-
-
PUNCT
,
det
Definite=Ind|PronType=Art
a
a
DET
DT
amod
Degree=Pos
blue
blue
ADJ
JJ
compound
Number=Sing
moon
moon
NOUN
NN
punct
-
-
PUNCT
HYPH
root
Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin
occur
occurs
VERB
VBZ
det
PronType=Tot
every
every
DET
DT
nummod
NumForm=Digit|NumType=Card
2.5
2.5
NUM
CD
obl:tmod
Number=Plur
year
years
NOUN
NNS
punct
.
.
PUNCT
.
(ROOT (S (NP (NP (DT The) (JJ last) (NN time)) (SBAR (S (NP (EX there)) (VP (VBD was) (NP (DT a) (JJ lunar) (JJ double) (NN take)))))) (VP (VBD was) (PP (IN in) (NP (NNP May) (CD 2007)))) (. .)))
The last time there was a lunar double take was in May 2007.
det
Definite=Def|PronType=Art
the
The
DET
DT
amod
Degree=Pos
last
last
ADJ
JJ
nsubj
Number=Sing
time
time
NOUN
NN
expl
there
there
PRON
EX
acl:relcl
Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin
be
was
VERB
VBD
det
Definite=Ind|PronType=Art
a
a
DET
DT
amod
Degree=Pos
lunar
lunar
ADJ
JJ
amod
Degree=Pos
double
double
ADJ
JJ
nsubj
Number=Sing
take
take
NOUN
NN
cop
Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin
be
was
AUX
VBD
case
in
in
ADP
IN
root
Number=Sing
May
May
PROPN
NNP
nummod
NumForm=Digit|NumType=Card
2007
2007
NUM
CD
punct
.
.
PUNCT
.
(ROOT (S (NP (NP (NNP New) (NNP Year) (POS 's)) (NNP Eve) (JJ blue) (NNS moons)) (VP (VBP are) (ADJP (JJR rarer)) (, ,) (S (VP (VBG occurring) (NP (DT every) (CD 19) (NNS years))))) (. .)))
New Year's Eve blue moons are rarer, occurring every 19 years.
amod
Degree=Pos
New
New
ADJ
NNP
nmod:poss
Number=Sing
Year
Year
PROPN
NNP
case
's
's
PART
POS
compound
Number=Sing
Eve
Eve
PROPN
NNP
amod
Degree=Pos
blue
blue
ADJ
JJ
nsubj
Number=Plur
moon
moons
NOUN
NNS
cop
Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin
be
are
AUX
VBP
root
Degree=Cmp
rare
rarer
ADJ
JJR
punct
,
,
PUNCT
,
advcl
VerbForm=Ger
occur
occurring
VERB
VBG
det
every
every
DET
DT
nummod
NumForm=Digit|NumType=Card
19
19
NUM
CD
obl:tmod
Number=Plur
year
years
NOUN
NNS
punct
.
.
PUNCT
.
(ROOT (S (S (NP (DT The) (JJ last) (NN time)) (VP (VBD was) (PP (IN in) (NP (CD 1990))))) (: ;) (S (NP (DT the) (JJ next) (NN one)) (VP (MD wo) (RB n't) (VP (VB come) (ADVP (RB again)) (PP (IN until) (NP (CD 2028)))))) (. .)))
The last time was in 1990; the next one won't come again until 2028.
det
Definite=Def|PronType=Art
the
The
DET
DT
amod
Degree=Pos
last
last
ADJ
JJ
nsubj
Number=Sing
time
time
NOUN
NN
cop
Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin
be
was
AUX
VBD
case
in
in
ADP
IN
root
NumForm=Digit|NumType=Card
1990
1990
NUM
CD
punct
;
;
PUNCT
:
det
Definite=Def|PronType=Art
the
the
DET
DT
amod
Degree=Pos
next
next
ADJ
JJ
nsubj
Number=Sing
one
one
NOUN
NN
aux
VerbForm=Fin
will
wo
AUX
MD
advmod
not
n't
PART
RB
parataxis
VerbForm=Inf
come
come
VERB
VB
advmod
again
again
ADV
RB
case
until
until
ADP
IN
obl
NumForm=Digit|NumType=Card
2028
2028
NUM
CD
punct
.
.
PUNCT
.
(ROOT (NFP  ))
root
PUNCT
NFP
(ROOT (SINV (`` ``) (S (NP (NNP Blue) (NNS moons)) (VP (VBP have) (NP (DT no) (JJ astronomical) (NN significance)))) (, ,) ('' '') (VP (VBD said)) (NP (NP (NNP Greg) (NNP Laughlin)) (, ,) (NP (NP (DT an) (NN astronomer)) (PP (IN at) (NP (NP (DT the) (NNP University)) (PP (IN of) (NP (NNP California))))))) (. .)))
"Blue moons have no astronomical significance," said Greg Laughlin, an astronomer at the University of California.
punct
``
``
PUNCT
``
amod
Degree=Pos
Blue
Blue
ADJ
NNP
nsubj
Number=Plur
moon
moons
NOUN
NNS
ccomp
Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin
have
have
VERB
VBP
det
no
no
DET
DT
amod
Degree=Pos
astronomical
astronomical
ADJ
JJ
obj
Number=Sing
significance
significance
NOUN
NN
punct
,
,
PUNCT
,
punct
''
''
PUNCT
''
root
Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin
say
said
VERB
VBD
nsubj
Number=Sing
Greg
Greg
PROPN
NNP
flat
Number=Sing
Laughlin
Laughlin
PROPN
NNP
punct
,
,
PUNCT
,
det
Definite=Ind|PronType=Art
a
an
DET
DT
appos
Number=Sing
astronomer
astronomer
NOUN
NN
case
at
at
ADP
IN
det
Definite=Def|PronType=Art
the
the
DET
DT
nmod
Number=Sing
University
University
PROPN
NNP
case
of
of
ADP
IN
nmod
Number=Sing
California
California
PROPN
NNP
punct
.
.
PUNCT
.
(ROOT (S (`` ``) (S (NP (JJ `Blue) (NN moon) ('' ')) (VP (VBZ is) (NP (RB just) (DT a) (NN name)) (PP (IN in) (NP (NP (DT the) (JJ same) (NN sense)) (PP (IN as) (NP (NP (NP (NP (DT a) (NN `hunter) (POS 's)) (NN moon) ('' ')) (-LRB- -LRB-) (NP (NP (DT a) (JJ full) (NN moon)) (PP (IN in) (NP (NN octorber)))) (-RRB- -RRB-)) (CC or) (NP (DT a) (NN `harvest) (NN moon)))))))) (, ,) ('' ') ('' '') (NP (NNP Laughlin)) (VP (VBD said) (PP (IN in) (NP (DT an) (NN e-mail)))) (. .)))
"`Blue moon' is just a name in the same sense as a `hunter's moon' (a full moon in octorber) or a `harvest moon,"' Laughlin said in an e-mail.
punct
``
``
PUNCT
``
amod
Degree=Pos
`Blue
`Blue
ADJ
JJ
nsubj
Number=Sing
moon
moon
NOUN
NN
punct
'
'
PUNCT
''
cop
Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin
be
is
AUX
VBZ
advmod
just
just
ADV
RB
det
Definite=Ind|PronType=Art
a
a
DET
DT
ccomp
Number=Sing
name
name
NOUN
NN
case
in
in
ADP
IN
det
Definite=Def|PronType=Art
the
the
DET
DT
amod
Degree=Pos
same
same
ADJ
JJ
nmod
Number=Sing
sense
sense
NOUN
NN
case
as
as
ADP
IN
det
Definite=Ind|PronType=Art
a
a
DET
DT
nmod:poss
Number=Sing
`hunter
`hunter
NOUN
NN
case
's
's
PART
POS
nmod
Number=Sing
moon
moon
NOUN
NN
punct
'
'
PUNCT
''
punct
(
(
PUNCT
-LRB-
det
Definite=Ind|PronType=Art
a
a
DET
DT
amod
Degree=Pos
full
full
ADJ
JJ
appos
Number=Sing
moon
moon
NOUN
NN
case
in
in
ADP
IN
nmod
Number=Sing
octorber
octorber
NOUN
NN
punct
)
)
PUNCT
-RRB-
cc
or
or
CCONJ
CC
det
Definite=Ind|PronType=Art
a
a
DET
DT
compound
Number=Sing
`harvest
`harvest
NOUN
NN
conj
Number=Sing
moon
moon
NOUN
NN
punct
,
,
PUNCT
,
punct
'
'
PUNCT
''
punct
''
''
PUNCT
''
nsubj
Number=Sing
Laughlin
Laughlin
PROPN
NNP
root
Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin
say
said
VERB
VBD
case
in
in
ADP
IN
det
Definite=Ind|PronType=Art
a
an
DET
DT
obl
Number=Sing
e-mail
e-mail
NOUN
NN
punct
.
.
PUNCT
.
(ROOT (NFP  ))
root
PUNCT
NFP
(ROOT (S (NP (NP (DT The) (JJ popular) (NN definition)) (PP (IN of) (NP (JJ blue) (NN moon)))) (VP (VBD came) (ADVP (RB about)) (SBAR (IN after) (S (NP (NP (DT a) (NN writer)) (PP (IN for) (NP (NML (NNP Sky) (CC &) (NNP Telescope)) (NN magazine))) (PP (IN in) (NP (CD 1946)))) (VP (VP (VBD misinterpreted) (NP (NP (DT the) (NNP Maine) (NNP Farmer) (POS 's)) (NNP Almanac))) (CC and) (VP (VBD labeled) (NP (DT a) (JJ blue) (NN moon)) (PP (IN as) (NP (NP (DT the) (JJ second) (JJ full) (NN moon)) (PP (IN in) (NP (DT a) (NN month)))))))))) (. .)))
The popular definition of blue moon came about after a writer for Sky & Telescope magazine in 1946 misinterpreted the Maine Farmer's Almanac and labeled a blue moon as the second full moon in a month.
det
Definite=Def|PronType=Art
the
The
DET
DT
amod
Degree=Pos
popular
popular
ADJ
JJ
nsubj
Number=Sing
definition
definition
NOUN
NN
case
of
of
ADP
IN
amod
Degree=Pos
blue
blue
ADJ
JJ
nmod
Number=Sing
moon
moon
NOUN
NN
root
Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin
come
came
VERB
VBD
advmod
about
about
ADV
RB
case
after
after
ADP
IN
det
Definite=Ind|PronType=Art
a
a
DET
DT
obl
Number=Sing
writer
writer
NOUN
NN
case
for
for
ADP
IN
compound
Number=Sing
Sky
Sky
PROPN
NNP
cc
&
&
CCONJ
CC
conj
Number=Sing
Telescope
Telescope
PROPN
NNP
nmod
Number=Sing
magazine
magazine
NOUN
NN
case
in
in
ADP
IN
obl
NumForm=Digit|NumType=Card
1946
1946
NUM
CD
advcl
Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin
misinterpret
misinterpreted
VERB
VBD
det
Definite=Def|PronType=Art
the
the
DET
DT
compound
Number=Sing
Maine
Maine
PROPN
NNP
nmod:poss
Number=Sing
Farmer
Farmer
PROPN
NNP
case
's
's
PART
POS
obj
Number=Sing
Almanac
Almanac
PROPN
NNP
cc
and
and
CCONJ
CC
conj
Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin
label
labeled
VERB
VBD
det
Definite=Ind|PronType=Art
a
a
DET
DT
amod
Degree=Pos
blue
blue
ADJ
JJ
obj
Number=Sing
moon
moon
NOUN
NN
case
as
as
ADP
IN
det
Definite=Def|PronType=Art
the
the
DET
DT
amod
Degree=Pos|NumType=Ord
second
second
ADJ
JJ
amod
Degree=Pos
full
full
ADJ
JJ
obl
Number=Sing
moon
moon
NOUN
NN
case
in
in
ADP
IN
det
Definite=Ind|PronType=Art
a
a
DET
DT
nmod
Number=Sing
month
month
NOUN
NN
punct
.
.
PUNCT
.
(ROOT (S (PP (IN In) (NP (NN fact))) (, ,) (NP (DT the) (NN almanac)) (VP (VBD defined) (NP (DT a) (JJ blue) (NN moon)) (PP (IN as) (NP (NP (DT the) (JJ third) (JJ full) (NN moon)) (PP (IN in) (NP (NP (DT a) (NN season)) (PP (IN with) (NP (CD four) (JJ full) (NNS moons)))))))) (. .)))
In fact, the almanac defined a blue moon as the third full moon in a season with four full moons.
case
in
In
ADP
IN
obl
Number=Sing
fact
fact
NOUN
NN
punct
,
,
PUNCT
,
det
Definite=Def|PronType=Art
the
the
DET
DT
nsubj
Number=Sing
almanac
almanac
NOUN
NN
root
Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin
define
defined
VERB
VBD
det
Definite=Ind|PronType=Art
a
a
DET
DT
amod
Degree=Pos
blue
blue
ADJ
JJ
obj
Number=Sing
moon
moon
NOUN
NN
case
as
as
ADP
IN
det
Definite=Def|PronType=Art
the
the
DET
DT
amod
Degree=Pos|NumType=Ord
third
third
ADJ
JJ
amod
Degree=Pos
full
full
ADJ
JJ
obl
Number=Sing
moon
moon
NOUN
NN
case
in
in
ADP
IN
det
Definite=Ind|PronType=Art
a
a
DET
DT
nmod
Number=Sing
season
season
NOUN
NN
case
with
with
ADP
IN
nummod
NumForm=Word|NumType=Card
four
four
NUM
CD
amod
Degree=Pos
full
full
ADJ
JJ
obl
Number=Plur
moon
moons
NOUN
NNS
punct
.
.
PUNCT
.
Once in a blue moon, there is one on New Year's Eve. Revelers ringing in 2010 will be treated to a so-called blue moon. According to popular definition, a blue moon is the second full moon in a month. But don't expect it to be blue - the name has nothing to do with the color of our closest celestial neighbor. A full moon occurred on December 2. It will appear again on Thursday in time for the New Year's countdown.  The New Year's Eve blue moon will be visible in the United States, Canada, Europe, South America and Africa. For partygoers in Australia and Asia, the full moon does not show up until New Year's Day, making January a blue moon month for them.  A full moon occurs every 29.5 days, and most years have 12. On average, an extra full moon in a month - a blue moon - occurs every 2.5 years. The last time there was a lunar double take was in May 2007. New Year's Eve blue moons are rarer, occurring every 19 years. The last time was in 1990; the next one won't come again until 2028.  "Blue moons have no astronomical significance," said Greg Laughlin, an astronomer at the University of California. "`Blue moon' is just a name in the same sense as a `hunter's moon' (a full moon in octorber) or a `harvest moon,"' Laughlin said in an e-mail.  The popular definition of blue moon came about after a writer for Sky & Telescope magazine in 1946 misinterpreted the Maine Farmer's Almanac and labeled a blue moon as the second full moon in a month. In fact, the almanac defined a blue moon as the third full moon in a season with four full moons.