( ( ( Molten rock ) ( in ( ( the ( earth 's ) ) crust ) ) ) . )
(ROOT (NP (NP (NN Molten) (NN rock)) (PP (IN in) (NP (NP (DT the) (NN earth) (POS 's)) (NN crust))) (. .)))
Molten rock 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))))) (. .)))