( Brass ( ( is ( ( a ( common alloy ) ) ( made ( by ( combining ( ( Copper and ) Zinc ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Brass)) (VP (VBZ is) (NP (NP (DT a) (JJ common) (NN alloy)) (VP (VBN made) (PP (IN by) (S (VP (VBG combining) (NP (NNP Copper) (CC and) (NNP Zinc)))))))) (. .)))
Brass is a common alloy made by combining Copper 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))))) (. .)))