People are riding in a crowded truck bed.
The truck bed has a lot of people in it.
if people are riding in a truck bed, the truck bed has people in it. crowded implies a lot of people.
exists e1 s1 x1 x2 x3.(in(e1,x2) & n_bed(x2) & of(x2,x3) & n_truck(x3) & a_crowded(s1) & Theme(s1,x2) & Actor(e1,x1) & v_ride(e1) & n_people(x1))
exists e1 x1 x2 x3 x4.(n_thing(x1) & n_bed(x1) & of(x1,x2) & n_truck(x2) & Theme(e1,x3) & Actor(e1,x1) & v_have(e1) & of(x3,x4) & in(x4,x1) & n_people(x4) & n_lot(x3))