There are two children at home, playing.
Two kids are tossing a ball.
Tossing a ball is not the only way two kids can play at home.
exists e1 p1 x1 x2.(for(p1,e1) & Actor(e1,x1) & v_play(e1) & at(p1,x2) & n_home(x2) & exists x3.((x1 = x3) & n_child(x3) & card_eq_2(x3)))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_toss(e1) & n_ball(x2) & n_kid(x1) & card_eq_2(x1))