( ( ( ( ( ( ( ( ( Chondrite meteorites ) , ) ( such ( as ( ( the one ) ( found ( in ( ( Monahans and ) ( the Zag ) ) ) ) ) ) ) ) , ) ( are ( thought ( to ( ( comprise ( some ( of ( the ( ( most primitive ) ingredients ) ) ) ) ) ( from ( ( the ( early period ) ) ( of ( the ( solar system ) ) ) ) ) ) ) ) ) ) , ) and ) ( ( ( the water ) ( in ( the crystals ) ) ) ( could ( ( date ( as ( far back ) ) ) ( as ( ( 4.5 billion ) years ) ) ) ) ) ) . )
(ROOT (S (S (NP (NP (JJ Chondrite) (NNS meteorites)) (, ,) (PP (JJ such) (IN as) (NP (NP (DT the) (NN one)) (VP (VBN found) (PP (IN in) (NP (NP (NNP Monahans)) (CC and) (NP (DT the) (NN Zag))))))) (, ,)) (VP (VBP are) (VP (VBN thought) (S (VP (TO to) (VP (VB comprise) (NP (NP (DT some)) (PP (IN of) (NP (DT the) (ADJP (RBS most) (JJ primitive)) (NNS ingredients)))) (PP (IN from) (NP (NP (DT the) (JJ early) (NN period)) (PP (IN of) (NP (DT the) (JJ solar) (NN system))))))))))) (, ,) (CC and) (S (NP (NP (DT the) (NN water)) (PP (IN in) (NP (DT the) (NNS crystals)))) (VP (MD could) (VP (VB date) (ADVP (RB as) (RB far) (RB back)) (PP (IN as) (NP (QP (CD 4.5) (CD billion)) (NNS years)))))) (. .)))
Chondrite meteorites, such as the one found in Monahans and the Zag, are thought to comprise some of the most primitive ingredients from the early period of the solar system, and the water in the crystals could date as far back as 4.5 billion years.
(ROOT (S (NP (NNS Meteorites)) (VP (VBP are) (ADVP (RB often)) (VP (VBN comprised) (PP (IN of) (NP (NP (NNS remnants)) (PP (IN of) (NP (NP (DT the) (JJS earliest) (NN material)) (SBAR (WHNP (WDT that)) (S (VP (VBN formed) (PP (IN in) (NP (DT the) (JJ solar) (NN system)))))))))))) (. .)))