Greyhounds race on a track.
The people are betting heavily at the dogs at the track.
Just because greyhounds race on a track does not mean that the people are betting heavily.
exists x1 x2 x3.(a_topic(x1) & on(x1,x3) & n_track(x3) & n_race(x1) & (x1 = x2) & ne_nam_greyhounds(x2))
exists e1 s1 x1 x2 x3.(n_track(x3) & n_dog(x2) & n_people(x1) & a_heavily(s1) & Manner(e1,s1) & at(e1,x2) & at(x2,x3) & Actor(e1,x1) & v_bet(e1))