A man wearing a green jacket and hat is snowboarding.
A man performs a snowboard trick.
A man snowboarding does not imply that he performs a trick.
exists e1 e2 s1 x1 x2 x3 x4 x5.(Actor(e2,x1) & v_snowboard(e2) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_hat(x5) & n_jacket(x4) & a_green(s1) & Theme(s1,x4) & subset_of(x5,x3) & subset_of(x4,x3) & (x1 = x2) & n_man(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_perform(e1) & n_trick(x2) & of(x2,x3) & n_snowboard(x3) & n_man(x1))