There are people in front of a restaurant.
There are no people in front of a movie theater.
There are either people or no people, and a restaurant is not a movie theater.
exists p1 x1 x2 x3.(in(p1,x2) & of(x2,x3) & n_restaurant(x3) & n_front(x2) & exists x4.((x1 = x4) & n_people(x4)))
exists p1 x1 x2 x3 x4.(in(p1,x2) & of(x2,x3) & n_theater(x3) & of(x3,x4) & n_movie(x4) & n_front(x2) & -exists x5.((x1 = x5) & n_people(x5)))