A biker is racing downhill.
road is closed downhill
If there's someone racing downhill, the road isn't closed.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_race(e1) & n_downhill(x2) & n_biker(x1))
exists p1 x1.(exists s1 x2.((x1 = x2) & n_downhill(x2) & a_closed(s1) & Theme(s1,x2)) & n_road(x1))