( Today ( ( the oceans ) ( ( have ( ( ( ( 55 ( times ( as much ) ) ) ( carbon dioxide ) ) as ) ( does ( the atmosphere ) ) ) ) . ) ) )
(ROOT (S (NP (NN Today)) (NP (DT the) (NNS oceans)) (VP (VBP have) (VP (ADVP (NP (QP (CD 55) (NNS times) (IN as) (JJ much)) (NN carbon) (NN dioxide)) (RB as)) (VBZ does) (NP (DT the) (NN atmosphere)))) (. .)))
Today the oceans have 55 times as much carbon dioxide as does the atmosphere.
(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))))) (. .)))