The snowboarder is sitting down.
the snowboarder is taking a break
The snowboarder might be sitting because he fell down, or is riding a chair lift. He might not be taking a break.
exists e1 s1 x1.(n_snowboarder(x1) & a_down(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sit(e1))
exists e1 x1 x2.(n_snowboarder(x1) & Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & n_break(x2))