A girl sits on a swing.
A girls sleeps on a swing.
The girl is either sits or sleeps on a swing.
exists e1 x1 x2.(on(e1,x2) & n_swing(x2) & Actor(e1,x1) & v_sit(e1) & n_girl(x1))
exists e1 x1 x2.(on(e1,x2) & n_swing(x2) & Actor(e1,x1) & v_sleep(e1) & n_girl(x1))