high school join
year from left league left to
high school
join year
from
left
league left to
list length list_number
list length list_number
list length
text <n,number> text <n,number> <n,text>
ainsworth 1954 county c league 1961 big nine conference
how many high schools had a league leave to big nine conference ?
WRB JJ JJ NNS VBD-AUX DT NN NN TO JJ CD NN .
8
select count ( c1 ) from w where c5 = 'big nine conference'