premise: Water polo swimmers competing for a loose ball.
hypothesis: A group of basketball players swimming together.
explanation_1: Water polo swimmers are not the same as basketball players. Also, "competing for a loose ball" and "swimming together" can not be done simultaneously.
explanation_2: Water polo and  basketball are two different games
explanation_3: The swimmers must be either Water polo swimmers or basketball players.
premise_logic: exists e1 s1 x1 x2 x3 x4 x5.(a_topic(x1) & for(e1,x5) & n_ball(x5) & a_loose(s1) & Theme(s1,x5) & Actor(e1,x4) & v_compete(e1) & (x1 = x4) & n_swimmer(x1) & (x1 = x3) & ne_nam_polo(x3) & (x1 = x2) & ne_nam_water(x2))
hypothesis_logic: exists e1 p1 x1 x2 x3 x4.(a_topic(x1) & exists s1.(Theme(s1,x4) & a_together(s1)) & Topic(e1,p1) & Actor(e1,x4) & v_swim(e1) & (x1 = x4) & of(x1,x2) & n_player(x2) & of(x2,x3) & n_basketball(x3) & n_group(x1))
premise_sim: exists e1 s1 x1 x2 x3 x4 x5.(v_compete(e1) & ne_nam_water(x2) & ne_nam_polo(x3) & n_swimmer(x1) & n_ball(x5) & for(e1,x5) & a_topic(x1) & a_loose(s1) & Theme(s1,x5) & Actor(e1,x4) & (x1 = x4) & (x1 = x3) & (x1 = x2))
hypothesis_sim: exists e1 p1 x1 x2 x3 x4.(v_swim(e1) & of(x2,x3) & of(x1,x2) & n_player(x2) & n_group(x1) & n_basketball(x3) & exists s1.(a_together(s1) & Theme(s1,x4)) & a_topic(x1) & Topic(e1,p1) & Actor(e1,x4) & (x1 = x4))