( Why ( ( ( does ( ( n't ( the ( ( iron and ) nickel ) ) ) ( in ( ( the ( Earth 's ) ) core ) ) ) ) melt ) ? ) )
(ROOT (SBARQ (WHADVP (WRB Why)) (SQ (VBZ does) (NP (NP (RB n't) (DT the) (NN iron) (CC and) (NN nickel)) (PP (IN in) (NP (NP (DT the) (NN Earth) (POS 's)) (NN core)))) (VP (VB melt))) (. ?)))
Why doesn't the iron and nickel in the Earth's core melt?
(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)))))))))))) (. .)))