Motocross Riders racing to the finish line.
Marathon runners race to the finish.
Motorcross riders can not race to the finish line with marathon runners.
exists x1 x2 x3 x4 x5.(n_line(x4) & of(x4,x5) & n_finish(x5) & a_topic(x1) & to(x1,x4) & n_racing(x1) & (x1 = x3) & ne_nam_riders(x3) & (x1 = x2) & ne_nam_motocross(x2))
exists x1 x2 x3 x4.(n_finish(x4) & a_topic(x1) & to(x1,x4) & n_race(x1) & of(x1,x3) & n_runner(x3) & (x1 = x2) & ne_nam_marathon(x2))