an old lady walks down the street.
An old lady with a cane walks on a street.
Just because she is old, does not mean she is necessarily walking with a cane.
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 s1 x1 x2 x3.(on(e1,x3) & n_street(x3) & Actor(e1,x1) & v_walk(e1) & with(x1,x2) & n_cane(x2) & n_lady(x1) & a_old(s1) & Theme(s1,x1))