A man sitting on the sidewalk with his dog.
Stray dogs walk in a dirt ally.
his dog implies that the dog is not stray.
exists e1 x1 x2 x3 x4.(n_dog(x4) & of(x4,x3) & n_male(x3) & n_sidewalk(x3) & a_topic(x1) & with(e1,x4) & on(e1,x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_man(x1))
exists e1 s1 x1 x2 x3.(in(e1,x2) & n_ally(x2) & of(x2,x3) & n_dirt(x3) & Actor(e1,x1) & v_walk(e1) & n_dog(x1) & a_stray(s1) & Theme(s1,x1))