( ( Origin ( of ( ( the ( Sun 's ) ) ( energy ( Several hypotheses ) ) ) ) ) ( ( can ( be ( made ( as ( to ( ( the origin ) ( of ( ( the ( Sun 's ) ) energy ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Origin)) (PP (IN of) (NP (NP (DT the) (NNP Sun) (POS 's)) (NN energy) (JJ Several) (NNS hypotheses)))) (VP (MD can) (VP (VB be) (VP (VBN made) (PP (IN as) (PP (TO to) (NP (NP (DT the) (NN origin)) (PP (IN of) (NP (NP (DT the) (NNP Sun) (POS 's)) (NN energy))))))))) (. .)))
Origin of the Sun's energy Several hypotheses can be made as to the origin of the Sun's energy.
(ROOT (S (PP (IN Over) (NP (NP (CD 90) (NN %)) (PP (IN of) (NP (DT the) (NN energy))))) (NP (PRP we)) (VP (VBP use) (SBAR (S (VP (VBZ comes) (ADVP (RB originally)) (PP (IN from) (NP (DT the) (NN sun))))))) (. .)))