A woman is hitting a tennis ball.
A tennis ball is being hit by a woman.
Woman hitting a tennis ball therefore ball is being hit.
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_hit(e1) & n_ball(x2) & of(x2,x3) & n_tennis(x3) & n_woman(x1))
exists e1 x1 x2 x3.(Actor(e1,x3) & n_woman(x3) & Theme(e1,x1) & v_hit(e1) & n_ball(x1) & of(x1,x2) & n_tennis(x2))