( ( bonding behaviour ) ( , ( ( including ( metal-metal bonding ) ) . ) ) )
(ROOT (FRAG (NP (NN bonding) (NN behaviour)) (, ,) (PP (VBG including) (NP (JJ metal-metal) (NN bonding))) (. .)))
bonding behaviour, including metal-metal bonding.
(ROOT (S (NP (DT The) (JJ metallic) (NN bond)) (VP (VBZ is) (ADJP (JJ responsible) (PP (IN for) (NP (NP (DT the) (NNS properties)) (PP (IN of) (NP (NNS metals))))))) (. .)))