( ( ( the nature ) ( of ( rocks ( , ( minerals ( , ( and fossils ) ) ) ) ) ) ) ; )
(ROOT (NP (NP (DT the) (NN nature)) (PP (IN of) (NP (NNS rocks) (, ,) (NNS minerals) (, ,) (CC and) (NNS fossils))) (: ;)))
the nature of rocks, minerals, and fossils;
(ROOT (S (NP (DT A) (NN mineral)) (VP (VBZ is) (VP (VBN described) (PP (IN as) (NP (NP (DT a) (JJ natural) (NN substance)) (SBAR (WHNP (WDT that)) (S (VP (VBZ makes) (PRT (RP up)) (NP (NNS rocks))))))))) (. .)))