( ( BRONZE ( ( An alloy ) ( containing ( ( ( ( 90 % ) copper ) and ) ( ( 10 % ) tin ) ) ) ) ) . )
(ROOT (S (VP (VB BRONZE) (NP (NP (DT An) (NN alloy)) (VP (VBG containing) (NP (NP (ADJP (CD 90) (NN %)) (NN copper)) (CC and) (NP (ADJP (CD 10) (NN %)) (NN tin)))))) (. .)))
BRONZE An alloy containing 90% copper and 10% tin.
(ROOT (S (NP (NN Bronze)) (VP (VBZ is) (NP (NP (DT an) (NN alloy)) (PP (IN of) (NP (NN copper) (CC and) (NN tin))))) (. .)))