( ( ( The ( electron shell ) ) ( of carbon ) ) ( ( ( ( ( ( contains ( yet ( another ( 4x3 resonance ) ) ) ) , ) ( with ( ( four ( valence electrons ) ) ( in ( its ( third shell ) ) ) ) ) ) , ) ( ( the ( only atom ) ) ( with ( both ( ( ( a nuclear ) and ) ( an ( electron ( shell ( 4x3 resonance ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN electron) (NN shell)) (PP (IN of) (NP (NN carbon)))) (VP (VBZ contains) (NP (RB yet) (DT another) (JJ 4x3) (NN resonance)) (, ,) (PP (IN with) (NP (NP (CD four) (JJ valence) (NNS electrons)) (PP (IN in) (NP (PRP$ its) (JJ third) (NN shell))))) (, ,) (NP (NP (DT the) (JJ only) (NN atom)) (PP (IN with) (NP (PDT both) (NP (DT a) (JJ nuclear)) (CC and) (NP (DT an) (JJ electron) (JJ shell) (JJ 4x3) (NN resonance)))))) (. .)))
The electron shell of carbon contains yet another 4x3 resonance, with four valence electrons in its third shell, the only atom with both a nuclear and an electron shell 4x3 resonance.
(ROOT (S (NP (CD Four) (JJ valence) (NNS electrons)) (VP (MD can) (VP (VB be) (VP (VBN found) (PP (IN in) (NP (DT a) (NN carbon) (NN atom)))))) (. .)))