A variety of folks in the back of a large wagon.
There are people on the wagon.
folks are people. if the people are in the back of a wagon, they must be on the wagon.
exists s1 x1 x2 x3 x4.(n_back(x3) & a_topic(x1) & of(x1,x2) & in(x2,x3) & of(x3,x4) & n_wagon(x4) & a_large(s1) & Theme(s1,x4) & n_folk(x2) & n_variety(x1))
exists p1 x1 x3.(n_wagon(x3) & exists x2.((x1 = x2) & on(x2,x3) & n_people(x2)))