an old lady walks down the street.
The lady is using the sidewalk.
She is not necessarily walking on the sidewalk, she could be on the actual street.
exists e1 s1 x1 x2.(n_street(x2) & down(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_lady(x1) & a_old(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_sidewalk(x2) & n_lady(x1) & Theme(e1,x2) & Actor(e1,x1) & v_use(e1))