A girl stands behind a boy in a swing.
a girl is standing
A person who is standing normally stands.
exists e1 x1 x2 x3.(behind(e1,x2) & in(x2,x3) & n_swing(x3) & n_boy(x2) & Actor(e1,x1) & v_stand(e1) & n_girl(x1))
exists e1 x1.(Actor(e1,x1) & v_stand(e1) & n_girl(x1))