A busy crowd in an Asian metropolis.
The Asian metropolis is empty.
A metropolis cannot have a crowd and be empty at the same time.
exists s1 s2 x1 x2.(a_topic(x1) & in(x1,x2) & n_metropolis(x2) & a_asian(s2) & Theme(s2,x2) & n_crowd(x1) & a_busy(s1) & Theme(s1,x1))
exists s1 s2 x1.(n_metropolis(x1) & a_asian(s1) & Theme(s1,x1) & Theme(s2,x1) & a_empty(s2))