Woman in green shirt, walking dog down a trail.
The dog is not within a mile of a trail.
It's not possible that the dog is not within a mile of a trail because the woman is walking the dog down a trail.
exists e1 s1 s2 x1 x2 x3 x4.(ne_nam_woman(s1) & a_topic(s1) & down(e1,x4) & n_trail(x4) & Theme(e1,x3) & Actor(e1,x2) & v_walk(e1) & n_dog(x3) & (s1 = x2) & in(s1,x1) & n_shirt(x1) & a_green(s2) & Theme(s2,x1))
exists x1.(n_dog(x1) & -exists p1 x2 x3.(within(x1,x2) & of(x2,x3) & n_trail(x3) & n_mile(x2)))