People in the city.
There is a city with people in it.
the city has people in it
exists x1 x2.(n_city(x2) & a_topic(x1) & in(x1,x2) & n_people(x1))
exists p1 x1 x2 x3.((x1 = x2) & with(x2,x3) & in(x3,x2) & n_thing(x2) & n_people(x3) & n_city(x2))