( Generally ( , ( ( a mineral ) ( ( is ( ( a ( ( naturally occurring ) solid ) ) ( with ( a ( crystalline structure ) ) ) ) ) . ) ) ) )
(ROOT (S (ADVP (RB Generally)) (, ,) (NP (DT a) (NN mineral)) (VP (VBZ is) (NP (NP (DT a) (ADJP (RB naturally) (VBG occurring)) (JJ solid)) (PP (IN with) (NP (DT a) (JJ crystalline) (NN structure))))) (. .)))
Generally, a mineral is a naturally occurring solid with a crystalline structure.
(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))))) (. .)))