( ( in helium ) ( , ( ( ( ( two protons ) and ) ( ( ( ( ( ( ( ( ( two neutrons ) , ) and ) in ) ( carbon ( , ( ( nitrogen and ) oxygen ) ) ) ) -- ) ( ( 6 ( , ( ( 7 and ) 8 ) ) ) ( of ( each particle ) ) ) ) , ) respectively ) ) . ) ) )
(ROOT (S (PP (IN in) (NP (NNP helium))) (, ,) (S (NP (CD two)) (VP (VBZ protons))) (CC and) (S (NP (NP (CD two) (NNS neutrons)) (, ,) (CC and) (ADVP (RB in)) (NP (NN carbon) (, ,) (NN nitrogen) (CC and) (NN oxygen)) (: --)) (PP (NP (CD 6) (, ,) (CD 7) (CC and) (CD 8)) (IN of) (NP (DT each) (NN particle))) (, ,) (ADVP (RB respectively))) (. .)))
in helium, two protons and two neutrons, and in carbon, nitrogen and oxygen--6, 7 and 8 of each particle, respectively.
(ROOT (S (NP (NP (DT A) (NN carbon) (NN atom)) (PP (IN with) (NP (NP (CD 6) (NNS protons)) (CC and) (NP (CD 8) (NNS neutrons))))) (VP (VBZ is) (ADVP (RBR more) (RB specifically)) (VP (VBN known) (PP (IN as) (NP (NN carbon) (CD 14))))) (. .)))
A carbon atom with 6 protons and 8 neutrons is more specifically known as carbon 14.