country builder location ship class / type
country
builder
location
ship
class \\/ type
number parsed year month day
address
date text text address text text
6 march united states john roach and son chester, pennsylvania city of rio de janeiro passenger ship
how many donterel class sloops were there in 1878 ?
WRB JJ NN NN NNS VBD-AUX EX IN CD .
2
select count ( * ) from w where c6 = 'doterel-class sloop'