A crowd forms in front of the theater.
Some people gather nearby a building.
A crowd in front of a theater doesn't imply they are nearby a building.
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 s1 x1 x2.(a_nearby(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_gather(e1) & n_building(x2) & n_people(x1))