People walking around town.
The crowd is running through the streets of town.
People cannot be walking and running the same time.
exists e1 x1 x2 x3.(a_topic(x1) & around(e1,x3) & n_town(x3) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_people(x1))
exists e1 x1 x2 x3.(n_street(x2) & n_crowd(x1) & through(e1,x2) & of(x2,x3) & n_town(x3) & Actor(e1,x1) & v_run(e1))