Three boys are playing soccer.
The children are playing with a ball.
Boys can be referred to as children and ball is another name for soccer.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_soccer(x2) & n_boy(x1) & card_eq_3(x1))
exists e1 x1 x2.(n_child(x1) & with(e1,x2) & n_ball(x2) & Actor(e1,x1) & v_play(e1))