Negros walk across a train track that stretches over dirt and garbage beside a row of poor shacks.
The people are rich.
Poor and rich are opposite ends of an economic hierarchy.
exists e1 e2 s1 x1 x2 x3 x4 x5 x6 x7 x8 x9.(across(e1,x2) & beside(e2,x8) & of(x8,x9) & n_shack(x9) & a_poor(s1) & Theme(s1,x9) & n_row(x8) & over(e2,x5) & n_garbage(x7) & n_dirt(x6) & subset_of(x7,x5) & subset_of(x6,x5) & Actor(e2,x4) & v_stretch(e2) & (x2 = x4) & n_track(x2) & of(x2,x3) & n_train(x3) & Actor(e1,x1) & v_walk(e1) & n_negro(x1))
exists s1 x1.(n_people(x1) & Theme(s1,x1) & a_rich(s1))