( Carbon ( ( has ( ( four ( valence electrons ) ) ( so ( it ( can ( combine ( with ( ( large number ) ( of ( other elements ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Carbon)) (VP (VBZ has) (NP (NP (CD four) (JJ valence) (NNS electrons)) (SBAR (IN so) (S (NP (PRP it)) (VP (MD can) (VP (VB combine) (PP (IN with) (NP (NP (JJ large) (NN number)) (PP (IN of) (NP (JJ other) (NNS elements))))))))))) (. .)))
Carbon has four valence electrons so it can combine with large number of other elements.
(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)))))) (. .)))