( ( ( Rocks , ) ( ( minerals and ) ( natural resources ) ) ) . )
(ROOT (NP (NP (NNS Rocks)) (, ,) (NP (NP (NNS minerals)) (CC and) (NP (JJ natural) (NNS resources))) (. .)))
Rocks, minerals and natural resources.
(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))))))))) (. .)))