( ( ( ( Bronze , ) ( ( an alloy ) ( of ( ( copper and ) tin ) ) ) ) , ) ( ( was ( ( used ( in ( enormous quantities ) ) ) ( during ( the ( Bronze Age ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NN Bronze)) (, ,) (NP (NP (DT an) (NN alloy)) (PP (IN of) (NP (NN copper) (CC and) (NN tin)))) (, ,)) (VP (VBD was) (VP (VBN used) (PP (IN in) (NP (JJ enormous) (NNS quantities))) (PP (IN during) (NP (DT the) (NN Bronze) (NN Age))))) (. .)))
Bronze, an alloy of copper and tin, was used in enormous quantities during the Bronze Age.
(ROOT (S (NP (NN Bronze)) (VP (VBZ is) (NP (NP (DT an) (NN alloy)) (PP (IN of) (NP (NN copper) (CC and) (NN tin))))) (. .)))