a snowboarder falling down after trying a trick
A basketball player dunks the ball.
A snowboarder can not be a basketball player while one who dunks the ball can not do so while falling down.
exists e2 e1 p1 x1 x2 x3.(a_topic(x1) & after(e1,e2) & Theme(e2,x3) & Actor(e2,x2) & v_try(e2) & n_trick(x3) & exists s1.(Theme(s1,x2) & a_down(s1)) & Topic(e1,p1) & Actor(e1,x2) & v_fall(e1) & (x1 = x2) & n_snowboarder(x1))
exists e1 x1 x2 x3.(n_ball(x3) & Theme(e1,x3) & Actor(e1,x1) & v_dunk(e1) & n_player(x1) & of(x1,x2) & n_basketball(x2))