A busy international airport.
A busy airport terminal.
Not all airport terminal are international.
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.(a_topic(x1) & n_terminal(x1) & of(x1,x2) & n_airport(x2) & a_busy(s1) & Theme(s1,x1))