Sentence:  His energy was prodigious ; sometimes he would be up before dawn , clad as a garbage collector and hurling pails into areaways to exasperate us , and thereafter would hurry to the <WSD>Bronx</WSD> Zoo to grimace at the lions and press cigar butts against their paws . 
Meaning of the word marked with <WSD> tags:  any number of entities (members) considered as a unit