A lot of people are marching through the street.
People are marching down main street.
Not all streets are main street.
exists e1 x1 x2 x3.(n_street(x3) & through(e1,x3) & Actor(e1,x1) & v_march(e1) & of(x1,x2) & n_people(x2) & n_lot(x1))
exists e1 s1 s2 x1 x2.(a_down(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_march(e1) & n_street(x2) & a_main(s1) & Theme(s1,x2) & n_people(x1))