( ( Since ( ( ( carbonic acid ) ( in seawater ) ) ( is ( in ( ( chemical equilibrium ) ( with ( atmospheric ( carbon dioxide ) ) ) ) ) ) ) ) ( , ( ( extraction ( of ( carbon ( from seawater ) ) ) ) ( ( has ( been studied ) ) . ) ) ) )
(ROOT (S (SBAR (IN Since) (S (NP (NP (JJ carbonic) (NN acid)) (PP (IN in) (NP (NN seawater)))) (VP (VBZ is) (PP (IN in) (NP (NP (NN chemical) (NN equilibrium)) (PP (IN with) (NP (JJ atmospheric) (NN carbon) (NN dioxide)))))))) (, ,) (NP (NP (NN extraction)) (PP (IN of) (NP (NP (NN carbon)) (PP (IN from) (NP (NN seawater)))))) (VP (VBZ has) (VP (VBN been) (VP (VBN studied)))) (. .)))
Since carbonic acid in seawater is in chemical equilibrium with atmospheric carbon dioxide, extraction of carbon from seawater has been studied.
(ROOT (S (NP (NNP Carbon) (NN dioxide)) (ADVP (RB chemically)) (VP (VBP weather) (NP (NNS rocks)) (PP (IN by) (S (VP (VBG creating) (NP (NNS acids)))))) (. .)))