( Carbon ( ( is ( ( ( the basis ) ( for ( all ( our life ) ) ) ) forms ) ) . ) )
(ROOT (S (NP (NNP Carbon)) (VP (VBZ is) (NP (NP (NP (DT the) (NN basis)) (PP (IN for) (NP (PDT all) (PRP$ our) (NN life)))) (NNS forms))) (. .)))
Carbon              is the basis for all our life forms.
(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))))))) (. .)))