A biker rides on a dirt road.
A biker riding on a dirt road is trying to get home.
Just because a biker is riding doesn't mean that they are trying to get home. They could be getting anywhere.
exists e1 x1 x2 x3.(on(e1,x2) & n_road(x2) & of(x2,x3) & n_dirt(x3) & Actor(e1,x1) & v_ride(e1) & n_biker(x1))
exists e1 p1 x1 x2 x3 x4.(Topic(e1,p1) & Actor(e1,x1) & v_try(e1) & exists e2 x5.(Theme(e2,x5) & Actor(e2,x1) & v_get(e2) & n_home(x5)) & on(x1,x3) & n_road(x3) & of(x3,x4) & n_dirt(x4) & n_riding(x1) & of(x1,x2) & n_biker(x2))