Two downhill skateboarders round a curve while others watch.
Two skateboarders race in front of a crowd.
Just because they are skating downhill doesn't mean they have to be in a race.
exists e1 p1 s1 x1 x2.(exists e2 x3.(Actor(e2,x3) & v_watch(e2) & -(x3 = x1) & n_person(x3)) & n_person(x1) & while(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_round(e1) & n_curve(x2) & n_skateboarder(x1) & a_downhill(s1) & Theme(s1,x1) & card_eq_2(x1))
exists x1 x2 x3 x4.(a_topic(x1) & in(x1,x3) & of(x3,x4) & n_crowd(x4) & n_front(x3) & n_race(x1) & of(x1,x2) & n_skateboarder(x2) & card_eq_2(x1))