( Geology ( ( is ( ( the study ) ( ( ( of ( ( the ( composition ( , ( structure ( , ( and history ) ) ) ) ) ) ( of ( the Earth ) ) ) ) and ) ( of ( ( the processes ) ( that ( ( ( operate ( ( ( on and ) within ) it ) ) , ) ( with ( emphasis ( on ( ( ( ( ( ( the crust ) , ) oceans ) , ) and ) atmosphere ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Geology)) (VP (VBZ is) (NP (NP (DT the) (NN study)) (PP (PP (IN of) (NP (NP (DT the) (NN composition) (, ,) (NN structure) (, ,) (CC and) (NN history)) (PP (IN of) (NP (DT the) (NN Earth))))) (CC and) (PP (IN of) (NP (NP (DT the) (NNS processes)) (SBAR (WHNP (WDT that)) (S (VP (VBP operate) (PP (IN on) (CC and) (IN within) (NP (PRP it))) (, ,) (PP (IN with) (NP (NP (NN emphasis)) (PP (IN on) (NP (NP (DT the) (NN crust)) (, ,) (NP (NNS oceans)) (, ,) (CC and) (NP (NN atmosphere)))))))))))))) (. .)))
Geology is the study of the composition, structure, and history of the Earth and of the processes that operate on and within it, with emphasis on the crust, oceans, and atmosphere.
(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)))))))))) (. .)))