number builder entered service withdrawn notes
number
builder
entered service
withdrawn
notes
number
number parsed year month day
number parsed year month day
number text date date text
439 nzr addington 9-1-1909 2-3-1957 converted to 4-cylinder simple, 6-1949
how many locomotives were still in service after the year 1950 ?
WRB JJ NNS VBD-AUX RB IN NN IN DT NN CD .
14
select count ( * ) from w where c3_year <= 1950 and c4_year >= 1950