( ( c -RRB- ) ( ( organic ( acids ( and ( carbon dioxide ) ) ) ) . ) )
(ROOT (S (LST (LS c) (-RRB- -RRB-)) (VP (VB organic) (NP (NNS acids) (CC and) (NN carbon) (NN dioxide))) (. .)))
c) organic acids and carbon dioxide.
(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)))))) (. .)))