Stevedores are waiting for a boat to dock.
Some men are preparing to unload to upcoming ship.
The ship is not necessarily going to unload, and the men are not necessarily preparing to unload anything.
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 e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_prepare(e1) & exists e2 e3 x2 x3.(to(e2,e3) & Theme(e3,x3) & Actor(e3,x2) & v_upcome(e3) & n_ship(x3) & Actor(e2,x1) & v_unload(e2)) & n_man(x1))