( Types ( of ( crystalline solids ) ) )
(ROOT (NP (NP (NNS Types)) (PP (IN of) (NP (JJ crystalline) (NNS solids)))))
Types of crystalline solids
(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))))) (. .)))