A lot of people are marching through the street.
People dance in a ballroom.
People marching through the street is contradictory to people dancing in a ballroom.
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 x1 x2 x3.(a_topic(x1) & in(x1,x3) & n_ballroom(x3) & n_dance(x1) & of(x1,x2) & n_people(x2))