Many people are sitting in a restaurant eating their meals.
The restaurant is completely empty.
A restaurant  cannot be simultaneously empty and have multiple people in it.
exists e1 e2 x1 x2 x3 x4.(in(e1,x2) & Theme(e2,x4) & Actor(e2,x3) & v_eat(e2) & n_meal(x4) & of(x4,x1) & n_thing(x1) & (x2 = x3) & n_restaurant(x2) & Actor(e1,x1) & v_sit(e1) & n_people(x1) & n_quantity(x1))
exists s1 x1.(n_restaurant(x1) & r_completely(s1) & Theme(s1,x1) & a_empty(s1))