Four men ride on the back of a dump truck.
Four men ride to work on a dump truck.
The men might work on the truck rather than be using it to get to work.
exists e1 x1 x2 x3 x4.(n_back(x2) & on(e1,x2) & of(x2,x3) & n_truck(x3) & of(x3,x4) & n_dump(x4) & Actor(e1,x1) & v_ride(e1) & n_man(x1) & card_eq_4(x1))
exists e1 p1 x1 x2.(Topic(e1,p1) & exists e2 x3 x4.(on(e2,x3) & n_truck(x3) & of(x3,x4) & n_dump(x4) & Actor(e2,x1) & v_work(e2)) & Actor(e1,x2) & v_ride(e1) & n_man(x2) & card_eq_4(x2) & n_man(x1) & card_eq_4(x1))