Two people are on top of the bed of a truck.
Two guys sit in the bed while the car is in motion.
A car is not a truck. Not all people are guys or males.   Not all truck with people on top of it are in motion.
exists p1 x1 x3.(n_bed(x3) & exists x2 x4.(on(x1,x2) & of(x2,x3) & of(x3,x4) & n_truck(x4) & n_top(x2)) & n_people(x1) & card_eq_2(x1))
exists e1 p1 x1 x2 x3.(n_car(x3) & n_bed(x2) & exists p2 x4.(in(x3,x4) & n_motion(x4)) & while(e1,p1) & in(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_guy(x1) & card_eq_2(x1))