A snowboarder jumping in the air off of snow.
A snowboarder is in a competition and doing a trick.
Not a snowboarders are in a competition.
exists e1 x1 x2 x3 x4.(n_air(x3) & a_topic(x1) & of(e1,x4) & n_snow(x4) & r_off(e1) & in(e1,x3) & Actor(e1,x2) & v_jump(e1) & (x1 = x2) & n_snowboarder(x1))
exists p1 x1.(exists e1 x2 x3 x4 x5.(in(x1,x2) & subset_of(e1,x2) & Theme(e1,x5) & Actor(e1,x4) & v_do(e1) & n_trick(x5) & n_thing(x4) & subset_of(x3,x2) & n_competition(x3)) & n_snowboarder(x1))