A man with a backpack sits on a fallen log by the river.
A man is by the river.
A man with a backpack is a type of man, and on a fallen log by the river is a paraphrase of by the river.
exists e1 s1 x1 x2 x3 x4.(n_river(x4) & by(e1,x4) & on(e1,x3) & n_log(x3) & a_fallen(s1) & Theme(s1,x3) & Actor(e1,x1) & v_sit(e1) & with(x1,x2) & n_backpack(x2) & n_man(x1))
exists p1 x1 x2.(n_river(x2) & by(x1,x2) & n_man(x1))