Many men on the back of a pick up truck going down a road.
A truck with just a driver going to a hospital.
Many men will not be on the back of the truck if there is only a driver in the truck.
exists e1 s1 x1 x2 x3 x4 x5 x6.(n_back(x2) & a_topic(x1) & a_down(s1) & Manner(e1,s1) & Theme(e1,x6) & Actor(e1,x5) & v_go(e1) & n_road(x6) & (x1 = x5) & on(x1,x2) & up(x2,x4) & n_truck(x4) & of(x2,x3) & n_pick(x3) & n_man(x1) & n_quantity(x1))
exists e1 x1 x2 x3 x4.(a_topic(x1) & with(x1,x2) & to(e1,x4) & n_hospital(x4) & Actor(e1,x3) & v_go(e1) & (x2 = x3) & r_just(x2) & n_driver(x2) & n_truck(x1))