A person is riding a dirt bike across a dirt covered path.
A person is riding a bike outdoors.
The person is riding a bike because the person is riding a dirt bike.
exists e1 e2 x1 x2 x3 x4 x5.(across(e1,x4) & n_path(x4) & Theme(e2,x4) & v_cover(e2) & of(x4,x5) & n_dirt(x5) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bike(x2) & of(x2,x3) & n_dirt(x3) & n_person(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_outdoors(x2) & of(x2,x3) & n_bike(x3) & n_person(x1))