Two girls are playing softball.
Girls play basketball.
The same subjects cannot be playing basketball and softball simultaneously.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_softball(x2) & n_girl(x1) & card_eq_2(x1))
exists x1 x2 x3.(a_topic(x1) & Time(x1,x3) & n_basketball(x3) & n_play(x1) & (x1 = x2) & ne_nam_girls(x2))