how thoroughly unrewarding all of this 
(ROOT (SBAR (WHADJP (WRB how) (RB thoroughly) (JJ unrewarding)) (FRAG (NP (NP (DT all)) (PP (IN of) (NP (DT this)))))))
(ROOT (SBAR (WHADJP (WRB ) (RB ) (JJ )) (FRAG (NP (NP (DT )) (PP (IN ) (NP (DT )))))))