premise: People are sitting on a train or subway.
hypothesis: There are people sitting.
explanation_1: If we know that people are sitting on a train or subway then we already know that there are people sitting - the second phrasing gives no new information.
premise_logic: exists e1 x1 x2.(on(e1,x2) & (n_train(x2) | n_subway(x2)) & Actor(e1,x1) & v_sit(e1) & n_people(x1))
hypothesis_logic: exists p1 x1 e1 x2 x3.((x1 = x2) & Actor(e1,x3) & v_sit(e1) & (x2 = x3) & n_people(x2))
premise_sim: exists e1 x1 x2.(v_sit(e1) & on(e1,x2) & n_people(x1) & Actor(e1,x1) & (n_train(x2) | n_subway(x2)))
hypothesis_sim: exists x1 e1 x2 x3.(v_sit(e1) & n_people(x2) & Actor(e1,x3) & (x2 = x3) & (x1 = x2))