( ( This substance ) ( ( ( occurs ( in nature ) ) ( as ( the ( mineral kermesite ) ) ) ) . ) )
(ROOT (S (NP (DT This) (NN substance)) (VP (VBZ occurs) (PP (IN in) (NP (NN nature))) (PP (IN as) (NP (DT the) (NN mineral) (NN kermesite)))) (. .)))
This substance occurs in nature as the mineral kermesite .
(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))))))))) (. .)))