A slam dunk performed at a basketball game.
nobody is going to play basketball at a basketball game.
If nobody is going to play at the basketball game, the a slam dunk wouldn't have been performed.
exists e1 x1 x2 x3 x4.(at(e1,x3) & n_game(x3) & of(x3,x4) & n_basketball(x4) & Actor(e1,x1) & v_perform(e1) & n_dunk(x1) & of(x1,x2) & n_slam(x2))
-exists e1 p1 x1.(Topic(e1,p1) & Actor(e1,x1) & v_go(e1) & exists e2 x2 x3 x4.(at(e2,x3) & n_game(x3) & of(x3,x4) & n_basketball(x4) & Theme(e2,x2) & Actor(e2,x1) & v_play(e2) & n_basketball(x2)) & n_person(x1))