The snowboarder is sitting down.
The snowboarder is tired.
We do not know if the snowboarder is tired... he might be sitting down because he is riding a chairlift.
exists e1 s1 x1.(n_snowboarder(x1) & a_down(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sit(e1))
exists s1 x1.(n_snowboarder(x1) & Theme(s1,x1) & a_tired(s1))