premise: two girls sitting by a tree while playing.
hypothesis: The girls are not near a tree.
explanation_1: The girls can either be sitting by a tree or are not near a tree.
explanation_2: The girls are not near a tree cannot be the same girls sitting by a tree
explanation_3: Girls by the tree are near the tree.
premise_logic: exists e1 e2 x1 x2 x3.(a_topic(x1) & while(e1,e2) & Actor(e2,x2) & v_play(e2) & by(e1,x3) & n_tree(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_girl(x1) & card_eq_2(x1))
hypothesis_logic: exists x1.(n_girl(x1) & -exists p1 x2.(near(x1,x2) & n_tree(x2)))