Three girls playing football.
Three girls playing.
Three girls playing only if there is a football.
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_football(x3) & (x1 = x2) & n_girl(x1) & card_eq_3(x1))
exists e1 x1.(Actor(e1,x1) & v_play(e1) & n_girl(x1) & card_eq_3(x1))