( ( For example ) ( ( , ( ( Ga ( ( ( would ( have ( three ( valence electrons ) ) ) ) , ) ( ( combine it ) ( with ( phosphorus ( -LRB- ( ( 5 ( valence electrons ) ) -RRB- ) ) ) ) ) ) ) , ) ) ( ( ( the average ) ( of ( ( 3 and ) 5 ) ) ) ( ( is 4 ) . ) ) ) )
(ROOT (S (PP (IN For) (NP (NN example))) (PRN (, ,) (S (NP (NNP Ga)) (VP (MD would) (VP (VB have) (NP (CD three) (JJ valence) (NNS electrons))) (, ,) (VP (VB combine) (NP (PRP it)) (PP (IN with) (NP (NP (NN phosphorus)) (PRN (-LRB- -LRB-) (NP (CD 5) (NNP valence) (NNS electrons)) (-RRB- -RRB-))))))) (, ,)) (NP (NP (DT the) (NN average)) (PP (IN of) (NP (CD 3) (CC and) (CD 5)))) (VP (VBZ is) (NP (CD 4))) (. .)))
For example, Ga would have three valence electrons, combine it with phosphorus (5 valence electrons), the average of 3 and 5 is 4.
(ROOT (S (NP (NNP Nitrogen)) (VP (VBZ has) (NP (CD 5) (JJ valence) (NNS electrons))) (. .)))