Sentence:  The Bayreuth Festival opens July 23 with a new production of `` Tannhaeuser '' staged by Wieland Wagner , who is doing all the operas this time , and <WSD>conducted</WSD> by Wolfgang Sawallisch . 
Meaning of the word marked with <WSD> tags:  lead, as in the performance of a composition; Barenboim conducted the Chicago symphony for years"