premise: A man with a backpack sits on a fallen log by the river.
hypothesis: A man is by the river.
explanation_1: 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.
premise_logic: 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))
hypothesis_logic: exists p1 x1 x2.(n_river(x2) & by(x1,x2) & n_man(x1))
premise_sim: exists e1 s1 x1 x2 x3 x4.(with(x1,x2) & v_sit(e1) & on(e1,x3) & n_river(x4) & n_man(x1) & n_log(x3) & n_backpack(x2) & by(e1,x4) & a_fallen(s1) & Theme(s1,x3) & Actor(e1,x1))
hypothesis_sim: exists x1 x2.(n_river(x2) & n_man(x1) & by(x1,x2))