The only thing I know about Gilbert is that I find him listed as co-author of Muskrat Ramble .
( ( ( The ( only thing ) ) ( I ( know ( about Gilbert ) ) ) ) ( ( is ( that ( I ( find ( him ( listed ( as ( co-author ( of ( Muskrat Ramble ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ only) (NN thing)) (SBAR (S (NP (PRP I)) (VP (VBP know) (PP (IN about) (NP (NNP Gilbert))))))) (VP (VBZ is) (SBAR (IN that) (S (NP (PRP I)) (VP (VBP find) (S (NP (PRP him)) (VP (VBN listed) (PP (IN as) (NP (NP (NN co-author)) (PP (IN of) (NP (NNP Muskrat) (NNP Ramble))))))))))) (. .)))
I wasn't aware of Gilbert's co-authorship of Muskrat Ramble.
( I ( ( ( was n't ) ( aware ( of ( ( ( Gilbert 's ) co-authorship ) ( of ( Muskrat Ramble ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBD was) (RB n't) (ADJP (JJ aware) (PP (IN of) (NP (NP (NP (NNP Gilbert) (POS 's)) (NN co-authorship)) (PP (IN of) (NP (NNP Muskrat) (NNP Ramble))))))) (. .)))