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(ROOT (ADVP (RB Back) (PP (TO to) (NP (NNP Solids) (CC and) (NNP Crystalline) (NNP State)))))
Back to Solids and Crystalline State
(ROOT (S (NP (NP (DT The) (NN majority)) (PP (IN of) (NP (NNS solids)))) (VP (VBP are) (VP (VBG crystalline) (PP (IN in) (NP (NN nature))))) (. .)))