A dog walking on a beach
A dog is on a beach to play fetch.
It is possible for a dog to do things on a beach other than play fetch.
exists x1 x2 x3.(a_topic(x1) & on(x1,x3) & n_beach(x3) & n_walking(x1) & of(x1,x2) & n_dog(x2))
exists p1 x1.(exists p2 x2.(on(x1,x2) & Topic(x2,p2) & exists e1 s1 x3.(a_fetch(s1) & Manner(e1,s1) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_thing(x3)) & n_beach(x2)) & n_dog(x1))