A busy international airport.
A quite day at the beach.
It is either a busy airport or a quiet beach, not both.
exists s1 s2 x1.(a_topic(x1) & n_airport(x1) & a_international(s2) & Theme(s2,x1) & a_busy(s1) & Theme(s1,x1))
exists s1 x1 x2.(n_beach(x2) & a_topic(x1) & at(x1,x2) & n_day(x1) & a_quite(s1) & Theme(s1,x1))