Snowboarder on a pink board flying through the air.
A young man is performing a flip before a crowded audience.
Not all snowboarders are a young man.  Flying through the air doesn't mean there is a crowded audience.
exists e1 s1 s2 x1 x2 x3.(n_air(x3) & ne_nam_snowboarder(s1) & a_topic(s1) & on(s1,x1) & through(e1,x3) & Actor(e1,x2) & v_fly(e1) & (x1 = x2) & n_board(x1) & a_pink(s2) & Theme(s2,x1))
exists e1 s1 s2 x1 x2 x3.(before(e1,x3) & n_audience(x3) & a_crowded(s2) & Theme(s2,x3) & Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_flip(x2) & n_man(x1) & a_young(s1) & Theme(s1,x1))