The bike is secured to a metal post.
She is riding the bike down the street.
Either the bike is being ridden or the bike is secure and not moving.
exists e1 x1 x2 x3.(n_bike(x1) & to(e1,x2) & n_post(x2) & of(x2,x3) & n_metal(x3) & Theme(e1,x1) & v_secure(e1))
exists e1 x1 x2 x3.(n_street(x3) & n_bike(x2) & n_female(x1) & down(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1))