This wall has a picture of a man on it.
There is a wall and it has a picture on it.
If the wall has a picture on it, then in general there is a wall that exists with a picture on it.
exists e1 x1 x2 x3.(n_thing(x1) & n_wall(x1) & on(e1,x1) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & of(x2,x3) & n_man(x3) & n_picture(x2))
exists e1 p1 x1 x2 x3.(n_thing(x2) & n_thing(x2) & Theme(e1,x3) & Actor(e1,x2) & v_have(e1) & on(x3,x2) & n_picture(x3) & exists x4.((x1 = x4) & n_wall(x4)))