( We ( ( shall ( ( define minerals ) ( as ( ( ( naturally occurring ) materials ) ( that ( ( are usually ) ( solids ( with ( a ( definite ( crystalline ( structure ( and ( chemical composition ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP We)) (VP (MD shall) (VP (VB define) (NP (NNS minerals)) (PP (IN as) (NP (NP (ADJP (RB naturally) (VBG occurring)) (NNS materials)) (SBAR (WHNP (WDT that)) (S (VP (VBP are) (ADVP (RB usually)) (ADJP (JJ solids) (PP (IN with) (NP (DT a) (JJ definite) (JJ crystalline) (NN structure) (CC and) (NN chemical) (NN composition))))))))))) (. .)))
We shall define minerals as naturally occurring materials that are usually solids with a definite crystalline structure and chemical composition .
(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))))))) (. .)))