( They ( ( are ( capable ( of ( reacting ( with ( ( a variety ) ( of ( ( ( ( ( natural metals ) , ) minerals ) and ) ( synthetic ( and ( organic compounds ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBP are) (ADJP (JJ capable) (PP (IN of) (S (VP (VBG reacting) (PP (IN with) (NP (NP (DT a) (NN variety)) (PP (IN of) (NP (NP (JJ natural) (NNS metals)) (, ,) (NP (NNS minerals)) (CC and) (NP (JJ synthetic) (CC and) (JJ organic) (NNS compounds))))))))))) (. .)))
They are capable of reacting with a variety of natural metals, minerals and synthetic and organic compounds.
(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))))))))) (. .)))