a person walks near a fence.
The person is standing still
still and walks are not the same
exists e1 x1 x2.(near(e1,x2) & n_fence(x2) & Actor(e1,x1) & v_walk(e1) & n_person(x1))
exists e1 s1 x1.(n_person(x1) & a_still(s1) & Manner(e1,s1) & Actor(e1,x1) & v_stand(e1))