( ( If ( ( the ( valence orbitals ) ) ( are ( ( ( ( ( ( 3p , ) ed ) , ) 4p ) or ) ( 4 d ) ) ) ) ) ( , ( ( the ( central atom ) ) ( ( ( ( can ( accommodate ( four ( oxo groups ) ) ) ) and ) ( unshared ( p-orbital electrons ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN If) (S (NP (DT the) (JJ valence) (NNS orbitals)) (VP (VBP are) (NP (NP (NNS 3p)) (, ,) (NP (NN ed)) (, ,) (NP (NNS 4p)) (CC or) (NP (CD 4) (NNS d)))))) (, ,) (NP (DT the) (JJ central) (NN atom)) (VP (VP (MD can) (VP (VB accommodate) (NP (CD four) (NN oxo) (NNS groups)))) (CC and) (VP (VBD unshared) (NP (JJ p-orbital) (NNS electrons)))) (. .)))
If the valence orbitals are 3p, ed, 4p or 4 d, the central atom can accommodate four oxo groups and unshared p-orbital electrons.
(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)))))) (. .)))