A man with a helmet rides his bike on a bumpy path.
The man is riding on a dirt trail.
the man on a bumpy path need not be riding on the dirty trail.
exists e1 s1 x1 x2 x3 x4.(on(e1,x4) & n_path(x4) & a_bumpy(s1) & Theme(s1,x4) & Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & n_bike(x3) & of(x3,x1) & n_male(x1) & with(x1,x2) & n_helmet(x2) & n_man(x1))
exists e1 x1 x2 x3.(n_man(x1) & on(e1,x2) & n_trail(x2) & of(x2,x3) & n_dirt(x3) & Actor(e1,x1) & v_ride(e1))