A crowd is gathering in a town square.
The people are beginning to disperse.
People cannot be gathering and dispersing at the same time.
exists e1 x1 x2 x3.(in(e1,x2) & n_square(x2) & of(x2,x3) & n_town(x3) & Actor(e1,x1) & v_gather(e1) & n_crowd(x1))
exists e1 p1 x1.(n_people(x1) & Topic(e1,p1) & Actor(e1,x1) & v_begin(e1) & exists e2.(Actor(e2,x1) & v_disperse(e2)))