( ( Calcite ( in ( the rock ) ) ) ( ( created ( bubbles ( of ( carbon dioxide ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Calcite)) (PP (IN in) (NP (DT the) (NN rock)))) (VP (VBD created) (NP (NP (NNS bubbles)) (PP (IN of) (NP (NN carbon) (NN dioxide))))) (. .)))
Calcite in the rock created bubbles of 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)))))) (. .)))