( ( As ( ( the earth ) ( ( cooled and ) ( grew solid ) ) ) ) ( , ( water ( ( was ( trapped ( in ( rocks ( in ( ( the ( earth 's ) ) crust ) ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN As) (S (NP (DT the) (NN earth)) (VP (VP (VBD cooled)) (CC and) (VP (VBD grew) (ADVP (RB solid)))))) (, ,) (NP (NN water)) (VP (VBD was) (VP (VBN trapped) (PP (IN in) (NP (NP (NNS rocks)) (PP (IN in) (NP (NP (DT the) (NN earth) (POS 's)) (NN crust))))))) (. .)))
As the earth cooled and grew solid, water was trapped in rocks in the earth's crust.
(ROOT (S (NP (NP (DT The) (NN earth) (POS 's)) (NN crust)) (VP (VBZ is) (VP (VBN composed) (PP (IN of) (NP (JJ igneuos) (NN rock))))) (. .)))