premise: A girl is laughing while holding some rocks in her right hand.
hypothesis: There is a girl laughing
explanation_1: If a girl is laughing, then the girl is laughing.
explanation_2: "A girl is laughing" and "there is a girl laughing",  are different ways to say the same thing.
explanation_3: "A girl laughing" is a rephrasing of "girl is laughing".
premise_logic: exists e2 e1 s1 x1 x2 x3.(while(e1,e2) & in(e2,x3) & n_hand(x3) & a_right(s1) & Theme(s1,x3) & of(x3,x1) & n_female(x1) & Theme(e2,x2) & Actor(e2,x1) & v_hold(e2) & n_rock(x2) & Actor(e1,x1) & v_laugh(e1) & n_girl(x1))
hypothesis_logic: exists p1 x1 e1 x2 x3.((x1 = x2) & Actor(e1,x3) & v_laugh(e1) & (x2 = x3) & n_girl(x2))
premise_sim: exists e2 e1 s1 x1 x2 x3.(while(e1,e2) & v_laugh(e1) & v_hold(e2) & of(x3,x1) & n_rock(x2) & n_hand(x3) & n_girl(x1) & n_female(x1) & in(e2,x3) & a_right(s1) & Theme(s1,x3) & Theme(e2,x2) & Actor(e2,x1) & Actor(e1,x1))
hypothesis_sim: exists x1 e1 x2 x3.(v_laugh(e1) & n_girl(x2) & Actor(e1,x3) & (x2 = x3) & (x1 = x2))