( ( ( The amounts ) ( of ( ( ( ( ( ( ( reduced ( carbon ( and ( carbon dioxide ) ) ) ) ( in ( the atmosphere ) ) ) , ) ( the ocean ) ) , ) and ) ( living organisms ) ) ) ) ( , ( however ( , ( ( are ( ( much smaller ) ( than ( those ( within ( sedimentary rocks ) ) ) ) ) ) . ) ) ) ) )
(ROOT (S (NP (NP (DT The) (NNS amounts)) (PP (IN of) (NP (NP (VBN reduced) (NN carbon) (CC and) (NN carbon) (NN dioxide)) (PP (IN in) (NP (DT the) (NN atmosphere))) (, ,) (NP (DT the) (NN ocean)) (, ,) (CC and) (NP (VBG living) (NNS organisms))))) (, ,) (ADVP (RB however)) (, ,) (VP (VBP are) (ADJP (ADJP (RB much) (JJR smaller)) (PP (IN than) (NP (NP (DT those)) (PP (IN within) (NP (JJ sedimentary) (NNS rocks))))))) (. .)))
The amounts of reduced carbon and carbon dioxide in the atmosphere, the ocean, and living organisms, however, are much smaller than those within sedimentary rocks.
(ROOT (S (PP (IN During) (NP (DT the) (JJ early) (NN paleozoic))) (, ,) (NP (NP (DT the) (NN amount)) (PP (IN of) (NP (NP (NN carbon) (NN dioxide)) (PP (IN in) (NP (DT the) (NN atmosphere)))))) (VP (VBD was) (ADJP (RB much) (JJR greater)) (PP (VBN compared) (PP (TO to) (NP (NN today))))) (. .)))