( Geology ( ( is ( ( ( ( ( ( ( the study ) ( of ( the ( ( constantly changing ) earth ) ) ) ) : ) ( ( ( its composition ) , ) ( its history ) ) ) , ) and ) ( ( the processes ) ( that ( change it ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Geology)) (VP (VBZ is) (NP (NP (NP (DT the) (NN study)) (PP (IN of) (NP (DT the) (ADJP (ADVP (RB constantly)) (VBG changing)) (NN earth)))) (: :) (NP (NP (PRP$ its) (NN composition)) (, ,) (NP (PRP$ its) (NN history))) (, ,) (CC and) (NP (NP (DT the) (NNS processes)) (SBAR (WHNP (WDT that)) (S (VP (VBP change) (NP (PRP it)))))))) (. .)))
Geology is the study of the constantly changing earth: its composition, its history, and the processes that change it.
(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)))))))))) (. .)))