( ( A mineral ) ( ( is ( ( a ( ( naturally occurring ) solid ) ) ( with ( a ( definite ( chemical ( composition ( and ( crystal structure ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (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 definite) (NN chemical) (NN composition) (CC and) (NN crystal) (NN structure))))) (. .)))
A mineral is a naturally occurring solid with a definite 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))))))) (. .)))