( ( ( ( ( ( Plucked String ) , ) ( Struck String ) ) , ) ( Energy ( of ( Vibration 10 ) ) ) ) . )
(ROOT (NP (NP (NNP Plucked) (NNP String)) (, ,) (NP (NNP Struck) (NNP String)) (, ,) (NP (NP (NNP Energy)) (PP (IN of) (NP (NNP Vibration) (CD 10)))) (. .)))
Plucked String, Struck String, Energy of Vibration 10.
(ROOT (S (PP (IN Like) (NP (NP (DT the) (NNS strings)) (PP (IN of) (NP (NN cello))))) (, ,) (NP (NP (NN anything)) (SBAR (WHNP (WDT that)) (S (VP (VBZ vibrates))))) (VP (VBZ produces) (NP (NP (NNS waves)) (PP (IN of) (NP (NN energy))))) (. .)))