A girl playing pool at a pool hall.
She is playing in a competition.
Just because a girl is playing pool at a pool hall doesn't mean she is in a competition.
exists e1 x1 x2 x3 x4 x5.(a_topic(x1) & at(e1,x4) & n_hall(x4) & of(x4,x5) & n_pool(x5) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_pool(x3) & (x1 = x2) & n_girl(x1))
exists e1 x1.(in(e1,x1) & n_competition(x1) & Actor(e1,x1) & v_play(e1) & n_female(x1))