A group of people on horses ride down a city street behind others who are walking.
Some people are walking in the parade, while others are riding horses in the parade.
It cannot be assumed that there is a parade going on.
exists e2 e1 x1 x2 x3 x4 x5 x6 x7.(behind(e1,x6) & Actor(e2,x7) & v_walk(e2) & (x6 = x7) & -(x6 = x1) & n_person(x1) & n_person(x6) & down(e1,x4) & n_street(x4) & of(x4,x5) & n_city(x5) & Actor(e1,x1) & v_ride(e1) & on(x1,x3) & n_horse(x3) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 p1 x1 x2.(n_parade(x2) & n_parade(x2) & n_person(x2) & exists e2 x3 x4.(in(e2,x2) & Theme(e2,x4) & Actor(e2,x3) & v_ride(e2) & n_horse(x4) & -(x3 = x2) & n_person(x3)) & while(e1,p1) & in(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_people(x1))