as a portrait of the artist as an endlessly inquisitive old man , however , it 's invaluable 
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(ROOT (S (PP (IN ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (DT ) (NN ))) (PP (IN ) (NP (DT ) (ADJP (RB ) (JJ )) (JJ ) (NN ))))) (, ) (ADVP (RB )) (, ) (NP (PRP )) (VP (VBZ ) (ADJP (JJ )))))