( ( ( The combination ) ( of ( ( ( ( ( six protons ) , ) ( six neutrons ) ) and ) ( six electrons ) ) ) ) ( ( makes carbon ) . ) )
(ROOT (S (NP (NP (DT The) (NN combination)) (PP (IN of) (NP (NP (CD six) (NNS protons)) (, ,) (NP (CD six) (NNS neutrons)) (CC and) (NP (CD six) (NNS electrons))))) (VP (VBZ makes) (NP (NN carbon))) (. .)))
The combination of six protons, six neutrons and six electrons makes carbon.
(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))))) (. .)))