A dog is standing on a footpath in front of a tree.
A dog is waiting for his owner to retrieve him in front of the tree.
The fact that a dog is standing in front of a tree or any other location does not indicate why he is standing there.  Nothing implies that he is waiting for his owner to retrieve him.
exists e1 x1 x2 x3 x4.(in(e1,x3) & of(x3,x4) & n_tree(x4) & n_front(x3) & on(e1,x2) & n_footpath(x2) & Actor(e1,x1) & v_stand(e1) & n_dog(x1))
exists e1 p1 x1 x2 x4.(n_tree(x4) & for(e1,x2) & Topic(x2,p1) & exists e2 x3.(in(e2,x3) & of(x3,x4) & n_front(x3) & Theme(e2,x1) & Actor(e2,x2) & v_retrieve(e2)) & n_male(x1) & n_male(x1) & n_owner(x2) & of(x2,x1) & Actor(e1,x1) & v_wait(e1) & n_dog(x1))