premise: Two boys are swimming underwater in a pool and a girl is swimming in the background.
hypothesis: They are playing in a sand box
explanation_1: They are either swimming in a pool or playing in a sandbox.
explanation_2: There can't be swimming in a sand box.
explanation_3: You cannot be underwater in a sandbox.
premise_logic: exists e1 e2 x1 x2 x3 x4 x5.(n_background(x5) & in(e2,x5) & Actor(e2,x4) & v_swim(e2) & n_girl(x4) & in(e1,x3) & n_pool(x3) & Theme(e1,x2) & Actor(e1,x1) & v_swim(e1) & n_underwater(x2) & n_boy(x1) & card_eq_2(x1))
hypothesis_logic: exists e1 x1 x2.(in(e1,x1) & n_box(x1) & of(x1,x2) & n_sand(x2) & Actor(e1,x1) & v_play(e1) & n_thing(x1))