A child is playing at a park.
The girl is playing on the swings.
There is nothing to indicate that the girl is playing on the swings
exists e1 x1 x2.(at(e1,x2) & n_park(x2) & Actor(e1,x1) & v_play(e1) & n_child(x1))
exists e1 x1 x2.(n_swing(x2) & n_girl(x1) & on(e1,x2) & Actor(e1,x1) & v_play(e1))