Costumed girl playing with a hula-hoop in a crowd.
The girl is performing an act.
just because a girl is playing with a hula-hoop in a crowd doesn't meant the girl is performing an act.
exists s1 x1 x2 x3 x4.(a_topic(x1) & with(x1,x3) & in(x3,x4) & n_crowd(x4) & n_hula-hoop(x3) & n_playing(x1) & of(x1,x2) & n_girl(x2) & a_costumed(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_girl(x1) & Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_act(x2))