( ( For ( a ( substance ( to ( be ( a mineral ) ) ) ) ) ) ( , ( it ( ( must ( be ( ( ( a ( ( naturally occurring ) ( , ( inorganic ( , ( crystalline ( ( solid ( that ( has ( a ( characteristic chemical ) ) ) ) ) composition ) ) ) ) ) ) ) and ) ( crystal structure ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN For) (NP (DT a) (NN substance) (S (VP (TO to) (VP (VB be) (NP (DT a) (NN mineral))))))) (, ,) (NP (PRP it)) (VP (MD must) (VP (VB be) (NP (NP (DT a) (ADJP (RB naturally) (VBG occurring)) (, ,) (JJ inorganic) (, ,) (JJ crystalline) (ADJP (JJ solid) (SBAR (WHNP (WDT that)) (S (VP (VBZ has) (NP (DT a) (JJ characteristic) (NN chemical)))))) (NN composition)) (CC and) (NP (NN crystal) (NN structure))))) (. .)))
For a substance to be a mineral, it must be a naturally occurring, inorganic, crystalline solid that has a characteristic chemical composition and crystal structure.
(ROOT (S (NP (DT A) (NN mineral)) (VP (VBZ is) (VP (VBN described) (PP (IN as) (NP (NP (DT a) (JJ solid) (JJ natural) (NN material)) (PP (IN with) (NP (DT a) (NN crystal) (NN structure))))))) (. .)))