premise: Two children are climbing stairs which lead to an airplane.
hypothesis: Two children are boarding a plane.
explanation_1: Plane is the shortened word for airplane, and "climbing stairs which lead to" is rephrased by the word boarding.
premise_logic: exists e1 e2 x1 x2 x3 x4.(Theme(e2,x2) & Actor(e2,x1) & v_climb(e2) & to(e1,x4) & n_airplane(x4) & Actor(e1,x3) & v_lead(e1) & (x2 = x3) & n_stair(x2) & n_child(x1) & card_eq_2(x1))
hypothesis_logic: exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_board(e1) & n_plane(x2) & n_child(x1) & card_eq_2(x1))
premise_sim: exists e1 e2 x1 x2 x3 x4.(v_lead(e1) & v_climb(e2) & to(e1,x4) & n_stair(x2) & n_child(x1) & n_airplane(x4) & card_eq_2(x1) & Theme(e2,x2) & Actor(e2,x1) & Actor(e1,x3) & (x2 = x3))
hypothesis_sim: exists e1 x1 x2.(v_board(e1) & n_plane(x2) & n_child(x1) & card_eq_2(x1) & Theme(e1,x2) & Actor(e1,x1))