People are walking up and down the streets.
People dance on the streets.
People may be walking up and down the streets but not necessarily dancing
exists e2 e1 s1 x1 x2 x3.(n_street(x3) & down(e2,x3) & Actor(e2,x2) & v_walk(e2) & n_people(x2) & a_up(s1) & Manner(e1,s1) & Actor(e1,x1) & v_walk(e1) & n_people(x1))
exists x1 x2 x3.(n_street(x3) & a_topic(x1) & on(x1,x3) & n_dance(x1) & of(x1,x2) & n_people(x2))