( ( ( ( ( ( ( 423-B03-0 Minerals ) , ) ( Natural Solids ) ) , ) and ) ( ( ( ( ( ( ( ( Rocks ( Rock-forming minerals ) ) , ) ( natural solids ) ) , ) ( crystal structure ) ) , ) and ) ( their formation ) ) ) . )
(ROOT (NP (NP (CD 423-B03-0) (NNPS Minerals)) (, ,) (NP (NNP Natural) (NNP Solids)) (, ,) (CC and) (NP (NP (NNP Rocks) (NNP Rock-forming) (NNS minerals)) (, ,) (NP (JJ natural) (NNS solids)) (, ,) (NP (NN crystal) (NN structure)) (, ,) (CC and) (NP (PRP$ their) (NN formation))) (. .)))
423-B03-0 Minerals, Natural Solids, and Rocks Rock-forming minerals, natural solids, crystal structure, and their formation.
(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))))))) (. .)))