Workmen on a fishing boat.
Workmen are on a boat.
Workman on a fishing boat.
exists s1 x1 x2.(ne_nam_workmen(s1) & a_topic(s1) & on(s1,x1) & n_boat(x1) & of(x1,x2) & n_fishing(x2))
exists p1 x1.(exists x2.(on(x1,x2) & n_boat(x2)) & n_workman(x1))