Police on horseback at an outside protest.
Police are sitting on horses outdoors.
The police are on horses
exists s1 x1 x2 x3.(a_topic(x1) & at(x1,x3) & n_protest(x3) & a_outside(s1) & Theme(s1,x3) & on(x1,x2) & n_horseback(x2) & n_police(x1))
exists e1 x1 x2 x3.(on(e1,x2) & n_outdoors(x2) & of(x2,x3) & n_horse(x3) & Actor(e1,x1) & v_sit(e1) & n_police(x1))