1950's police cars at food a cart truck.
The car is a police car.
Police cars are present.
all x1 x2.((n_truck(x1) & of(x1,x2) & n_cart(x2)) -> exists x3 x4 x5 x6.(a_topic(x4) & for(x4,x1) & at(x4,x6) & n_food(x6) & n_car(x4) & of(x4,x5) & n_police(x5) & of(x4,x3) & n_date(x3) & a_date_year_1950(x3) & a_date_year_1950(x3)))
exists p1 x1.(n_car(x1) & exists x2 x3.((x1 = x2) & n_car(x2) & of(x2,x3) & n_police(x3)))