a boy plays on the swing.
A boy is outside.
swing implies that the boy is outside.
exists e1 x1 x2.(n_swing(x2) & on(e1,x2) & Actor(e1,x1) & v_play(e1) & n_boy(x1))
exists s1 x1.(Theme(s1,x1) & a_outside(s1) & n_boy(x1))