Two people are on top of the bed of a truck.
A couple people are in the back of a truck.
Two people is a couple of people.
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 p1 x1 x2 x3.(n_back(x3) & exists x4.(in(x1,x3) & of(x3,x4) & n_truck(x4)) & n_people(x1) & of(x1,x2) & n_couple(x2))