Cop riding a horse on the street.
A K9 police dog is riding a horse.
Either a cop or a K9 police dog is riding a horse.
exists e1 x1 x2 x3.(n_street(x3) & ne_nam_cop(x1) & on(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_horse(x2))
exists e1 x1 x2 x3 x4.(Theme(e1,x4) & Actor(e1,x1) & v_ride(e1) & n_horse(x4) & n_dog(x1) & of(x1,x3) & n_police(x3) & (x1 = x2) & ne_org_k9(x2))