premise: A girl plays on the swing.
hypothesis: The boy sat on the swing.
explanation_1: There is either a girl or a boy on the swing cannot be both.
premise_logic: exists e1 x1 x2.(n_swing(x2) & on(e1,x2) & Actor(e1,x1) & v_play(e1) & n_girl(x1))
hypothesis_logic: exists e1 x1 x2.(n_swing(x2) & n_boy(x1) & on(e1,x2) & Actor(e1,x1) & v_sit(e1))
premise_sim: exists e1 x1 x2.(v_play(e1) & on(e1,x2) & n_swing(x2) & n_girl(x1) & Actor(e1,x1))
hypothesis_sim: exists e1 x1 x2.(v_sit(e1) & on(e1,x2) & n_swing(x2) & n_boy(x1) & Actor(e1,x1))