Five people are sitting inside a building.
There are no people in that build.
You cannot have no people and five people at a location at the same time.
exists e1 x1 x2.(inside(e1,x2) & n_building(x2) & Actor(e1,x1) & v_sit(e1) & n_people(x1) & card_eq_5(x1))
exists e1 p1 x1 x2 x4.(n_thing(x4) & Actor(e1,x1) & v_build(e1) & -exists x3.((x2 = x3) & in(x3,x4) & n_people(x3)) & (x1 = x2))