Sentence:  The Bayreuth Festival opens July 23 with a new production of `` Tannhaeuser '' staged by Wieland Wagner , who is doing <WSD>all</WSD> the operas this time , and conducted by Wolfgang Sawallisch . 
Meaning of the word marked with <WSD> tags:  quantifier; used with either mass or count nouns to indicate the whole number or amount of or every one of a class