A crowd of people is walking in the same direction.
A crowd of people are exiting the building.
We have no idea if they are exiting the building or not, they could be going anywhere.
exists e1 s1 x1 x2 x3.(n_direction(x3) & a_same(s1) & Theme(s1,x3) & in(e1,x3) & Actor(e1,x1) & v_walk(e1) & of(x1,x2) & n_people(x2) & n_crowd(x1))
exists e1 x1 x2 x3.(n_building(x3) & Theme(e1,x3) & Actor(e1,x1) & v_exit(e1) & of(x1,x2) & n_people(x2) & n_crowd(x1))