A snowboarder is flying in the air attempting to land on a snow mound.
A person is snowboarding.
A person must be snowboarding in order to be a snowboarder flying in the air.
exists e2 e1 p1 x1 x2 x3.(n_air(x2) & in(e1,x2) & Topic(e2,p1) & Actor(e2,x3) & v_attempt(e2) & exists e3 x4 x5.(on(e3,x4) & n_mound(x4) & of(x4,x5) & n_snow(x5) & Actor(e3,x3) & v_land(e3)) & (x2 = x3) & Actor(e1,x1) & v_fly(e1) & n_snowboarder(x1))
exists e1 x1.(Actor(e1,x1) & v_snowboard(e1) & n_person(x1))