A plaza consisting of restaurants with people walking the streets and sitting outdoors.
The plaza is empty.
If the plaza is filled with people, then it is not empty.
exists e3 e2 e1 x1 x2 x3 x4 x5 x6 x7 x8.(n_street(x7) & a_topic(x1) & of(e1,x3) & subset_of(x8,x3) & n_outdoors(x8) & Actor(e3,x8) & v_sit(e3) & subset_of(x4,x3) & with(x4,x5) & Theme(e2,x7) & Actor(e2,x6) & v_walk(e2) & (x5 = x6) & n_people(x5) & n_restaurant(x4) & Actor(e1,x2) & v_consist(e1) & (x1 = x2) & n_plaza(x1))
exists s1 x1.(n_plaza(x1) & Theme(s1,x1) & a_empty(s1))