The black dog is standing by the wall next to the orange.
A dog watches over his owners orange.
Just because he is standing next to the orange does not mean that he watches over it.
exists e1 s1 x1 x2 x3.(n_orange(x3) & n_wall(x2) & n_dog(x1) & a_black(s1) & Theme(s1,x1) & to(e1,x3) & r_next(e1) & by(e1,x2) & Actor(e1,x1) & v_stand(e1))
exists e2 e1 x1 x2 x3.(over(e1,x2) & Actor(e2,x3) & v_orange(e2) & (x2 = x3) & n_owner(x2) & of(x2,x1) & n_male(x1) & Actor(e1,x1) & v_watch(e1) & n_dog(x1))