Two people are on top of the bed of a truck.
The truck's bed is full of garbage.
If a truck's bed were full of garbage, then there would be no space for any occupants to be on top of the bed of this truck.
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 s1 x1 x2 x3.(n_bed(x2) & of(x2,x1) & n_truck(x1) & of(s1,x3) & n_garbage(x3) & Theme(s1,x2) & a_full(s1))