A snowboarder is doing a trick.
The snowboarder is in the snow.
the snowboarder is doing a trick in the snow
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_trick(x2) & n_snowboarder(x1))
exists p1 x1 x2.(n_snow(x2) & n_snowboarder(x1) & in(x1,x2))