There are plenty of people in the city shopping.
People are shopping in the city.
people are shopping.
exists p1 x1 x4 x5.(n_shopping(x4) & of(x4,x5) & n_city(x5) & exists x2 x3.((x1 = x2) & of(x2,x3) & in(x3,x4) & n_people(x3) & n_plenty(x2)))
exists e1 x1 x2.(n_city(x2) & in(e1,x2) & Actor(e1,x1) & v_shop(e1) & n_people(x1))