( ( Brass ( ( An alloy ) ( of ( ( ( copper ( -LRB- ( ( ( ( 60 percent ) or ) over ) -RRB- ) ) ) and ) zinc ) ) ) ) . )
(ROOT (NP (NP (NNS Brass)) (NP (NP (DT An) (NN alloy)) (PP (IN of) (NP (NP (NP (NN copper)) (PRN (-LRB- -LRB-) (NP (NP (CD 60) (NN percent)) (CC or) (NP (IN over))) (-RRB- -RRB-))) (CC and) (NP (NN zinc))))) (. .)))
Brass An alloy of copper (60 percent or over) and zinc.
(ROOT (S (NP (NNP Brass) (NNP alloy)) (VP (VBZ is) (VP (VBN made) (PP (IN from) (NP (NN copper) (CC and) (NN zinc))))) (. .)))