( Geology ( ( is ( ( the study ) ( of ( ( the ( composition ( , ( structure ( , ( and history ) ) ) ) ) ) ( of ( the earth ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Geology)) (VP (VBZ is) (NP (NP (DT the) (NN study)) (PP (IN of) (NP (NP (DT the) (NN composition) (, ,) (NN structure) (, ,) (CC and) (NN history)) (PP (IN of) (NP (DT the) (NN earth))))))) (. .)))
Geology is the study of the composition, structure, and history of the earth.
(ROOT (S (SBAR (WHADVP (WRB How)) (S (NP (NN ice) (NNS cores)) (VP (VBP are) (ADJP (JJ important) (PP (TO to) (NP (NP (DT the) (NN study)) (PP (IN of) (NP (JJ geologic) (NN history))))))))) (VP (VBZ is) (ADVP (RBS best)) (VP (VBN described) (SBAR (IN as) (S (NP (PRP they)) (VP (VBP contain) (NP (NN evidence) (NN showing) (NNS changes)) (PP (IN in) (NP (NP (DT the) (JJ atmospheric) (NN composition)) (PP (IN over) (NP (NN time)))))))))) (. .)))