( Carbon ( ( is ( ( a ( key element ) ) ( to ( all ( known life ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Carbon)) (VP (VBZ is) (NP (NP (DT a) (JJ key) (NN element)) (PP (TO to) (NP (DT all) (VBN known) (NN life))))) (. .)))
Carbon is a key element to all known life.
(ROOT (S (NP (NNP Carbon)) (VP (VBZ is) (NP (NP (DT the) (NN basis)) (PP (IN of) (NP (NP (DT all) (NN life)) (PP (IN on) (NP (NN earth))))))) (. .)))