Marathon runners on a road in front of a mountain ridge.
Runners on a road.
RUnners may be in a marathon.
exists x1 x2 x3 x4 x5 x6.(a_topic(x1) & on(x1,x3) & in(x3,x4) & of(x4,x5) & n_ridge(x5) & of(x5,x6) & n_mountain(x6) & n_front(x4) & n_road(x3) & n_runner(x1) & (x1 = x2) & ne_nam_marathon(x2))
exists x1 x2.(a_topic(x1) & on(x1,x2) & n_road(x2) & n_runner(x1))