premise: Two brown dogs with green harnesses play tug-of-war.
hypothesis: There are dogs playing together
explanation_1: scenteence two is a simplified version of scentence one by implying that there are dogs playing together instead of being specific about characteristics of the dogs or the act of playing
explanation_2: Playing tug-of-war is a game that must be played together, thus it implies that the dogs are playing together.
explanation_3: If the dogs play tog-of-war, they're playing together.
premise_logic: exists e1 s1 s2 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & n_tug-of-war(x3) & with(x1,x2) & n_harness(x2) & a_green(s2) & Theme(s2,x2) & n_dog(x1) & a_brown(s1) & Theme(s1,x1) & card_eq_2(x1))
hypothesis_logic: exists p1 x1 e1 s1 x2 x3.((x1 = x2) & a_together(s1) & Manner(e1,s1) & Actor(e1,x3) & v_play(e1) & (x2 = x3) & n_dog(x2))