, they 're merely signposts marking the slow , lingering death of imagination . 
(ROOT (S (, ,) (NP (PRP they)) (VP (VBP 're) (ADVP (RB merely)) (NP (NP (NNS signposts)) (VP (VBG marking) (NP (NP (DT the) (JJ slow) (, ,) (VBG lingering) (NN death)) (PP (IN of) (NP (NN imagination))))))) (. .)))
(ROOT (S (, ) (NP (PRP )) (VP (VBP ) (ADVP (RB )) (NP (NP (NNS )) (VP (VBG ) (NP (NP (DT ) (JJ ) (, ) (VBG ) (NN )) (PP (IN ) (NP (NN ))))))) (. )))