( ( Polished ( Quartz ( Sample ( Quartz crystal ) ) ) ) ( ( can ( be ( ( used ( by ( scientists ( as ( a tool ) ) ) ) ) ( for ( finding ( ( other ( mineral deposits ) ) ( such ( as petroleum ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Polished) (NNP Quartz) (NNP Sample) (NNP Quartz) (NNP crystal)) (VP (MD can) (VP (VB be) (VP (VBN used) (PP (IN by) (NP (NP (NNS scientists)) (PP (IN as) (NP (DT a) (NN tool))))) (PP (IN for) (S (VP (VBG finding) (NP (NP (JJ other) (NN mineral) (NNS deposits)) (PP (JJ such) (IN as) (NP (NN petroleum)))))))))) (. .)))
Polished Quartz Sample Quartz crystal can be used by scientists as a tool for finding other mineral deposits such as petroleum.
(ROOT (S (NP (DT The) (NN mineral) (NN quartz)) (VP (VBZ is) (VP (VBN used) (S (VP (TO to) (VP (VB produce) (NP (NN glass))))))) (. .)))