a dirt bike ride through the sand hill.
A motorcycle riding on concrete.
sand hill and concrete are different spots
exists x1 x2 x3 x4 x5.(n_hill(x4) & of(x4,x5) & n_sand(x5) & a_topic(x1) & through(x1,x4) & n_ride(x1) & of(x1,x3) & n_bike(x3) & of(x1,x2) & n_dirt(x2))
exists x1 x2 x3.(a_topic(x1) & on(x1,x3) & n_concrete(x3) & n_riding(x1) & of(x1,x2) & n_motorcycle(x2))