People are walking by a food cart in the city.
People walking in a city.
People walking by a food cart means the must be walking in a city.
exists e1 x1 x2 x3 x4.(n_city(x4) & by(e1,x2) & in(x2,x4) & n_cart(x2) & of(x2,x3) & n_food(x3) & Actor(e1,x1) & v_walk(e1) & n_people(x1))
exists e1 x1 x2 x3.(a_topic(x1) & in(e1,x3) & n_city(x3) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_people(x1))