A graceful basketball player stands at the two point line as she throws the ball.
The gym is empty
If a basketball player stands and throws the ball then she is in the gym, so the gym is not empty.
exists e1 p1 s1 x1 x2 x3 x4 x5.(n_ball(x5) & n_female(x4) & n_line(x3) & of(x3,x4) & n_point(x4) & card_eq_2(x3) & exists e2.(Theme(e2,x5) & Actor(e2,x4) & v_throw(e2)) & as(e1,p1) & at(e1,x3) & Actor(e1,x1) & v_stand(e1) & n_player(x1) & of(x1,x2) & n_basketball(x2) & a_graceful(s1) & Theme(s1,x1))
exists s1 x1.(n_gym(x1) & Theme(s1,x1) & a_empty(s1))