A boy sits on the tall fence post and smiles.
The boy is sitting on the ground.
Either, he is sitting on the tall fence post or the ground.
exists e1 e2 s1 x1 x2 x3 x4.(n_post(x2) & of(x2,x3) & n_fence(x3) & a_tall(s1) & Theme(s1,x2) & Actor(e2,x4) & v_smile(e2) & n_boy(x4) & on(e1,x2) & Actor(e1,x1) & v_sit(e1) & n_boy(x1))
exists e1 x1 x2.(n_ground(x2) & n_boy(x1) & on(e1,x2) & Actor(e1,x1) & v_sit(e1))