A group of people move through a crowded station.
An empty train station.
An empty train station cannot be crowded.
exists e1 s1 x1 x2 x3.(through(e1,x3) & n_station(x3) & a_crowded(s1) & Theme(s1,x3) & Actor(e1,x1) & v_move(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists s1 x1 x2.(a_topic(x1) & n_station(x1) & of(x1,x2) & n_train(x2) & a_empty(s1) & Theme(s1,x1))