Sentence:  One day when he attended a war memorial ceremony in <WSD>Westminster</WSD> Abbey his view was obstructed by a stout man on his left , his attention turned to the irregular pattern of the rough slab flooring and someone , clasping him by the arm , whispered , `` I want a word with you , please '' . 
Meaning of the word marked with <WSD> tags:  any number of entities (members) considered as a unit