Runners, running uphill with spectators on the sidelines.
People are walking downhill.
If people are running uphill, they cannot be walking downhill.
exists e1 x1 x2 x3 x4.(n_sideline(x4) & on(e1,x4) & with(e1,x3) & n_spectator(x3) & Theme(e1,x2) & Actor(e1,x1) & v_run(e1) & n_uphill(x2) & n_runner(x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_downhill(x2) & n_people(x1))