A young boy plays on a swing.
A young boy plays in the grass with a puppy
The boy either plays on a swing, or plays in the grass.
exists e1 s1 x1 x2.(on(e1,x2) & n_swing(x2) & Actor(e1,x1) & v_play(e1) & n_boy(x1) & a_young(s1) & Theme(s1,x1))
exists s1 x1 x2 x3 x4.(n_grass(x3) & a_topic(x1) & in(x1,x3) & with(x3,x4) & n_puppy(x4) & n_play(x1) & of(x1,x2) & n_boy(x2) & a_young(s1) & Theme(s1,x1))