Four boys playing soccer.
Boys are playing with a ball.
Playing soccer implies playing with a ball
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_soccer(x3) & (x1 = x2) & n_boy(x1) & card_eq_4(x1))
exists e1 x1 x2.(with(e1,x2) & n_ball(x2) & Actor(e1,x1) & v_play(e1) & n_boy(x1))