Stevedores are waiting for a boat to dock.
Some people are at a dock.
Stevedores are some people, and dock implies boat.
exists e1 x1 x2 x3.(for(e1,x2) & to(x2,x3) & n_dock(x3) & n_boat(x2) & Actor(e1,x1) & v_wait(e1) & n_stevedore(x1))
exists p1 x1.(exists x2.(at(x1,x2) & n_dock(x2)) & n_people(x1))