( This ( ( is ( ( a blend ) ( of ( mineral ( and ( synthetic oil ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VBZ is) (NP (NP (DT a) (NN blend)) (PP (IN of) (NP (NN mineral) (CC and) (JJ synthetic) (NN oil))))) (. .)))
This is a blend of mineral and synthetic oil.
(ROOT (S (NP (DT A) (JJ synthetic) (NN diamond)) (VP (VBZ is) (RB not) (VP (VBN considered) (NP (DT a) (NN mineral)) (SBAR (IN because) (S (NP (NNS minerals)) (VP (MD must) (VP (VB be) (VP (VBN created) (ADVP (RB naturally))))))))) (. .)))