Four men ride on the back of a dump truck.
Four construction workers are hanging onto a truck.
Construction workers don't ride on the backs of dump trucks.
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 x1 x2 x3.(onto(e1,x3) & n_truck(x3) & Actor(e1,x1) & v_hang(e1) & n_worker(x1) & of(x1,x2) & n_construction(x2) & card_eq_4(x1))