( It ( ( is ( ( a ( white ( crystalline solid ) ) ) ( that ( is volatile ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ is) (NP (NP (DT a) (JJ white) (JJ crystalline) (NN solid)) (SBAR (WHNP (WDT that)) (S (VP (VBZ is) (ADJP (JJ volatile))))))) (. .)))
It is a white crystalline solid that is volatile.
(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))))) (. .)))