( That ( ( is ( melted ( rock ( inside ( ( the ( earth 's ) ) crust ) ) ) ) ) . ) )
(ROOT (S (NP (DT That)) (VP (VBZ is) (VP (VBN melted) (NP (NP (NN rock)) (PP (IN inside) (NP (NP (DT the) (NN earth) (POS 's)) (NN crust)))))) (. .)))
That is melted rock inside 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))))) (. .)))