( ( From ( center ( to surface ) ) ) ( , ( ( ( the ( chemically ( distinct layers ) ) ) ( of ( the earth ) ) ) ( ( are ( ( ( ( ( ( ( inner core ) , ) ( outer core ) ) , ) mantle ) , ) crust ) ) . ) ) ) )
(ROOT (S (PP (IN From) (NP (NP (NN center)) (PP (TO to) (NP (NN surface))))) (, ,) (NP (NP (DT the) (JJ chemically) (JJ distinct) (NNS layers)) (PP (IN of) (NP (DT the) (NN earth)))) (VP (VBP are) (NP (NP (JJ inner) (NN core)) (, ,) (NP (JJ outer) (NN core)) (, ,) (NP (NN mantle)) (, ,) (NP (NN crust)))) (. .)))
From center to surface, the chemically distinct layers of the earth are inner core, outer core, mantle, crust.
(ROOT (S (NP (NP (DT The) (JJ outer) (NN core)) (PP (IN of) (NP (DT the) (NN earth)))) (VP (VBZ is) (ADJP (JJ molten))) (. .)))