( ( Seismic studies ) ( ( indicate ( that ( ( the Earth ) ( has ( ( an ( iron ( nickel core ) ) ) ( that ( ( ( is probably ) ( very similar ) ) ( to ( iron ( meteorite specimens ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Seismic) (NNS studies)) (VP (VBP indicate) (SBAR (IN that) (S (NP (DT the) (NN Earth)) (VP (VBZ has) (NP (NP (DT an) (NN iron) (NN nickel) (NN core)) (SBAR (WHNP (WDT that)) (S (VP (VBZ is) (ADVP (RB probably)) (ADJP (RB very) (JJ similar)) (S (VP (TO to) (VP (VB iron) (NP (JJ meteorite) (NNS specimens))))))))))))) (. .)))
Seismic studies indicate that the Earth has an iron nickel core that is probably very similar to iron meteorite specimens.
(ROOT (S (NP (DT Some) (NNS meteorites)) (VP (VP (VBP are) (VP (VBN made) (PP (IN of) (NP (NN iron) (CC and) (NN nickel))))) (CC and) (VP (VBP are) (VP (VBN thought) (S (VP (TO to) (VP (VB be) (ADJP (RB very) (JJ similar) (PP (TO to) (NP (NP (DT the) (NN core)) (PP (IN of) (NP (DT the) (NN earth)))))))))))) (. .)))