( and ( ( ( ( ( carbon-14 ( -LRB- ( ( 14 C ) -RRB- ) ) ) , ) ( which ( also ( contains ( 6 ( ( protons and ) electrons ) ) ) ) ) ) , ) ( ( but ( has ( 8 neutrons ) ) ) . ) ) )
(ROOT (S (CC and) (NP (NP (JJ carbon-14)) (PRN (-LRB- -LRB-) (NP (QP (CD 14) (CD C))) (-RRB- -RRB-)) (, ,) (SBAR (WHNP (WDT which)) (S (ADVP (RB also)) (VP (VBZ contains) (NP (CD 6) (NNS protons) (CC and) (NNS electrons))))) (, ,)) (VP (CC but) (VP (VBZ has) (NP (CD 8) (NNS neutrons)))) (. .)))
and carbon-14 ( 14 C), which also contains 6 protons and electrons, but has 8 neutrons.
(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.