a bicyclist jumping a trick on a bike
A bicyclist is in a competition on a bike.
Just because someone is jumping a trick on a bike does not mean that they are in a competition.
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x4) & n_bike(x4) & Theme(e1,x3) & Actor(e1,x2) & v_jump(e1) & n_trick(x3) & (x1 = x2) & n_bicyclist(x1))
exists p1 x1 x2.(on(p1,x2) & n_bike(x2) & exists x3.(in(x1,x3) & n_competition(x3)) & n_bicyclist(x1))