Two girls laugh while other girls look on.
Some children are laughing.
Girls are children and they are laughing.
exists e1 p1 x1.(exists e2 p2 x2.(exists s1.(Theme(s1,x2) & a_on(s1)) & Topic(e2,p2) & Actor(e2,x2) & v_look(e2) & -(x2 = x1) & n_girl(x2)) & n_girl(x1) & n_girl(x1) & while(e1,p1) & Actor(e1,x1) & v_laugh(e1) & card_eq_2(x1))
exists e1 x1.(Actor(e1,x1) & v_laugh(e1) & n_child(x1))