People in the city.
People in the city enjoying the sights.
Not all people in the city happen to be enjoying sights.
exists x1 x2.(n_city(x2) & a_topic(x1) & in(x1,x2) & n_people(x1))
exists e1 x1 x2 x3 x4.(n_sight(x4) & n_city(x2) & a_topic(x1) & in(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_enjoy(e1) & (x2 = x3) & n_people(x1))