( ( For example ) ( , ( ( ( all atoms ) ( of carbon ) ) ( ( contain ( ( ( ( six protons ) , ) ( ( all atoms ) ( of oxygen ) ) ) ( contain ( eight protons ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN For) (NP (NN example))) (, ,) (NP (NP (DT all) (NNS atoms)) (PP (IN of) (NP (NN carbon)))) (VP (VBP contain) (SBAR (S (NP (NP (CD six) (NNS protons)) (, ,) (NP (NP (DT all) (NNS atoms)) (PP (IN of) (NP (NN oxygen))))) (VP (VBP contain) (NP (CD eight) (NNS protons)))))) (. .)))
For example, all atoms of carbon contain six protons, all atoms of oxygen contain eight protons.
(ROOT (S (NP (DT All) (NN carbon) (NNS atoms)) (VP (VBP have) (NP (CD six) (NNS protons))) (. .)))