The four children are playing with a ball outside a building.
The ball is being bounced.
They may be playing with it without it being bounced.
exists e1 x1 x2 x3.(n_child(x1) & card_eq_4(x1) & with(e1,x2) & outside(x2,x3) & n_building(x3) & n_ball(x2) & Actor(e1,x1) & v_play(e1))
exists e1 x1.(n_ball(x1) & Theme(e1,x1) & v_bounce(e1))