( ( ( ( metal-ligand ( multiple bonding ) ) , ) ( metal-metal bonds ) ) ; )
(ROOT (NP (NP (JJ metal-ligand) (JJ multiple) (NN bonding)) (, ,) (NP (JJ metal-metal) (NNS bonds)) (: ;)))
metal-ligand multiple bonding, metal-metal bonds;
(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))))))) (. .)))