People walk through a square.
People walking to work.
Not everyone walking through a square is going to work.
exists e1 x1 x2.(through(e1,x2) & n_square(x2) & Actor(e1,x1) & v_walk(e1) & n_people(x1))
exists e1 p1 x1 x2.(a_topic(x1) & Topic(e1,p1) & Actor(e1,x2) & v_walk(e1) & exists e2.(Actor(e2,x2) & v_work(e2)) & (x1 = x2) & n_people(x1))