Tennis player is serving the ball.
Tennis player is serving.
ball is what the player is serving
exists e1 x1 x2 x3.(n_ball(x3) & Theme(e1,x3) & Actor(e1,x1) & v_serve(e1) & n_player(x1) & (x1 = x2) & ne_nam_tennis(x2))
exists e1 x1 x2.(Actor(e1,x1) & v_serve(e1) & n_player(x1) & (x1 = x2) & ne_nam_tennis(x2))