( It ( ( is ( a ( grey ( crystalline ( solid material ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ is) (NP (DT a) (JJ grey) (JJ crystalline) (JJ solid) (NN material))) (. .)))
It is a grey crystalline solid material.
(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))))) (. .)))