felt work about impossible , irrevocable choices and the price of making them . 
(ROOT (S (VP (VBD felt) (NP (NP (NN work)) (PP (IN about) (NP (NP (JJ impossible) (, ,) (JJ irrevocable) (NNS choices)) (CC and) (NP (NP (DT the) (NN price)) (PP (IN of) (S (VP (VBG making) (NP (PRP them)))))))))) (. .)))
(ROOT (S (VP (VBD ) (NP (NP (NN )) (PP (IN ) (NP (NP (JJ ) (, ) (JJ ) (NNS )) (CC ) (NP (NP (DT ) (NN )) (PP (IN ) (S (VP (VBG ) (NP (PRP )))))))))) (. )))