premise: Two children play on a barrel turned swing.
hypothesis: Some people are swimming in a lake.
explanation_1: The statement that two children play on a barrel turned swing does not lead in any way to the statement that some people are swimming in a lake; based on the information provided, there is no indication that the swing is by a lake or that there are other people around, much less swimming.  The swing could be absolutely anywhere in the world, in any type of terrain.
premise_logic: exists e2 e1 x1 x2 x3 x4.(on(e1,x2) & Theme(e2,x4) & Actor(e2,x3) & v_turn(e2) & n_swing(x4) & (x2 = x3) & n_barrel(x2) & Actor(e1,x1) & v_play(e1) & n_child(x1) & card_eq_2(x1))
hypothesis_logic: exists e1 x1 x2.(in(e1,x2) & n_lake(x2) & Actor(e1,x1) & v_swim(e1) & n_people(x1))
premise_sim: exists e2 e1 x1 x2 x3 x4.(v_turn(e2) & v_play(e1) & on(e1,x2) & n_swing(x4) & n_child(x1) & n_barrel(x2) & card_eq_2(x1) & Theme(e2,x4) & Actor(e2,x3) & Actor(e1,x1) & (x2 = x3))
hypothesis_sim: exists e1 x1 x2.(v_swim(e1) & n_people(x1) & n_lake(x2) & in(e1,x2) & Actor(e1,x1))