A man is sitting on a stool fishing.
a man sitting while fishing because he is tired
One doesn't have to be tired to sit down.
exists e1 x1 x2 x3.(on(e1,x2) & n_fishing(x2) & of(x2,x3) & n_stool(x3) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists e1 p1 x1 x2 x3.(a_topic(x1) & exists s1.(Theme(s1,x1) & a_tired(s1)) & n_male(x1) & because(e1,p1) & while(e1,x3) & n_fishing(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_man(x1))