Person on swing
the person on swing
Person on swing means the same thing as person on swing.
exists x1 x2.(a_topic(x1) & on(x1,x2) & n_swing(x2) & n_person(x1))
exists x1 x2.(n_person(x1) & a_topic(x1) & on(x1,x2) & n_swing(x2))