People are sitting and standing at the back of a large room filled with screens and lights set-up.
The room is empty.
An empty room cannot have people sitting and standing in it.
exists e1 e2 e3 s1 s2 x1 x2 x3 x4 x5 x6 x7 x8 x9.(n_back(x3) & at(e2,x3) & of(x3,x4) & with(e3,x6) & subset_of(x8,x6) & Theme(s2,x9) & a_set-up(s2) & (x8 = x9) & n_light(x8) & subset_of(x7,x6) & n_screen(x7) & Theme(e3,x5) & v_fill(e3) & (x4 = x5) & n_room(x4) & a_large(s1) & Theme(s1,x4) & Actor(e2,x2) & v_stand(e2) & n_people(x2) & Actor(e1,x1) & v_sit(e1) & n_people(x1))
exists s1 x1.(n_room(x1) & Theme(s1,x1) & a_empty(s1))