the irksome , tiresome nature of complacency 
(ROOT (NP (NP (DT the) (JJ irksome) (, ,) (JJ tiresome) (NN nature)) (PP (IN of) (NP (NN complacency)))))
(ROOT (NP (NP (DT ) (JJ ) (, ) (JJ ) (NN )) (PP (IN ) (NP (NN )))))