A crowd forms in front of the theater.
A group of people gather in front of the theater.
A group of people is a crowd and to form is to gather.
exists x1 x2 x3 x4.(n_theater(x4) & a_topic(x1) & in(x1,x3) & of(x3,x4) & n_front(x3) & n_form(x1) & of(x1,x2) & n_crowd(x2))
exists e1 x1 x2 x3 x4.(n_theater(x4) & in(e1,x3) & of(x3,x4) & n_front(x3) & Actor(e1,x1) & v_gather(e1) & of(x1,x2) & n_people(x2) & n_group(x1))