The tennis player with the blue hat and green shirt, served the ball with top spin on the ball.
The tennis player drops the ball.
Serving a ball with top spin does not necessarily imply that the ball drops.
exists e1 s1 s2 s3 x1 x2 x3 x4 x5 x6 x7.(n_ball(x6) & n_ball(x6) & n_shirt(x5) & a_green(s2) & Theme(s2,x5) & n_hat(x4) & subset_of(x5,x3) & subset_of(x4,x3) & a_blue(s1) & Theme(s1,x3) & n_player(x1) & of(x1,x2) & n_tennis(x2) & on(e1,x6) & with(e1,x7) & n_spin(x7) & a_top(s3) & Theme(s3,x7) & Theme(e1,x6) & Actor(e1,x1) & v_serve(e1) & with(x1,x3))
exists e1 x1 x2 x3.(n_ball(x3) & n_player(x1) & of(x1,x2) & n_tennis(x2) & Theme(e1,x3) & Actor(e1,x1) & v_drop(e1))