( ( ( ( ( While ( ( all ( 6 elements ) ) ( are important ) ) ) ( , ( ( all life ) ( is ( based ( on ( a ( carbon system ) ) ) ) ) ) ) ) and ) ( therefore ( some ( would ( consider ( C ( to ( be ( the ( most important ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (SBAR (IN While) (S (NP (DT all) (CD 6) (NNS elements)) (VP (VBP are) (ADJP (JJ important))))) (, ,) (NP (DT all) (NN life)) (VP (VBZ is) (VP (VBN based) (PP (IN on) (NP (DT a) (NN carbon) (NN system)))))) (CC and) (S (ADVP (RB therefore)) (NP (DT some)) (VP (MD would) (VP (VB consider) (S (NP (NNP C)) (VP (TO to) (VP (VB be) (NP (DT the) (ADJP (RBS most) (JJ important))))))))) (. .)))
While all 6 elements are important, all life is based on a carbon system and therefore some would consider C to be the most important.
(ROOT (S (NP (DT All) (NN life)) (VP (VBZ is) (VP (VBN built) (PP (IN around) (NP (DT the) (NN element) (NN carbon))))) (. .)))