( ( All ( living organisms ) ) ( ( ( ( are ( ( made mostly ) ( of carbon ) ) ) and ) ( continue ( to ( ( maintain ( their ( carbon levels ) ) ) ( while ( they ( ( are still ) living ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT All) (VBG living) (NNS organisms)) (VP (VP (VBP are) (VP (VBN made) (ADVP (RB mostly)) (PP (IN of) (NP (NN carbon))))) (CC and) (VP (VBP continue) (S (VP (TO to) (VP (VB maintain) (NP (PRP$ their) (NN carbon) (NNS levels)) (SBAR (IN while) (S (NP (PRP they)) (VP (VBP are) (ADVP (RB still)) (VP (VBG living)))))))))) (. .)))
All living organisms are made mostly of carbon and continue to maintain their carbon levels while they are still living.
(ROOT (S (NP (NNP Carbon)) (VP (VBZ is) (NP (NP (DT the) (ADJP (RBS most) (VBN found)) (NN element)) (PP (IN in) (NP (VBG living) (NNS organisms))))) (. .)))