A snowboarder jumps off of a jump.
He is competing in freestyle snowboarding
Just because you are currently snowboarding doesn't always mean you are competing in a freestyle snowboarding event.
exists e1 x1 x2.(r_off(e1) & of(e1,x2) & n_jump(x2) & Actor(e1,x1) & v_jump(e1) & n_snowboarder(x1))
exists e1 s1 x1.(in(e1,x1) & n_snowboarding(x1) & a_freestyle(s1) & Theme(s1,x1) & Actor(e1,x1) & v_compete(e1) & n_male(x1))