Girls playing basketball.
The girls are playing ball.
Basketball can be called "ball" and girls are playing both basketball and "ball."
exists s1 x1 x2 x3.(n_basketball(x1) & a_.(s1) & Theme(s1,x1) & of(x1,x3) & n_playing(x3) & (x1 = x2) & ne_nam_girls(x2) & a_topic(x1))
exists e1 x1 x2.(n_girl(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_ball(x2))