A street washer washing the street.
A woman is washing the street.
Not all street washer is a woman.
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x2) & Actor(e1,x3) & v_wash(e1) & n_street(x2) & n_street(x2) & (x1 = x3) & n_washer(x1) & of(x1,x2))
exists e1 x1 x2.(n_street(x2) & Theme(e1,x2) & Actor(e1,x1) & v_wash(e1) & n_woman(x1))