operators named trains destination year begun year discontinued
operators
named trains
destination
year begun
year discontinued
list length list_address
number parsed year
number
text text <a,address> date number
baltimore and ohio capitol limited chicago, illinois via washington, d.c. and pittsburgh, pennsylvania 1923 1958
what is the total number of year begun ?
WP VBD-AUX DT JJ NN IN NN VBN .
6
select count ( c4 ) from w