A bunch of cyclist are riding their bikes down the road.
The people are walking down the road.
The cyclists can't be riding their bikes while walking.
exists e1 x1 x2 x3 x4.(n_road(x4) & down(e1,x4) & Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & n_bike(x3) & of(x3,x1) & n_thing(x1) & of(x1,x2) & n_cyclist(x2) & n_bunch(x1))
exists e1 x1 x2.(n_road(x2) & n_people(x1) & down(e1,x2) & Actor(e1,x1) & v_walk(e1))