( Carbon ( ( is ( composed ( of ( ( ( ( ( six protons ) , ) ( six neutrons ) ) and ) ( six electrons ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Carbon)) (VP (VBZ is) (VP (VBN composed) (PP (IN of) (NP (NP (CD six) (NNS protons)) (, ,) (NP (CD six) (NNS neutrons)) (CC and) (NP (CD six) (NNS electrons)))))) (. .)))
Carbon is composed of six protons, six neutrons and six electrons.
(ROOT (S (NP (NNP Carbon) (NNS atoms)) (VP (VBP have) (NP (NP (CD six) (NNS protons)) (CC and) (NP (NP (NNS electrons)) (NP (DT each))))) (. .)))