Michael Gläser
... that the choral conductor Michael Gläser was called in to lead the Thomanerchor in Leipzig when its musical director Georg Christoph Biller fell ill?
... that the choral conductor <b id="mwB68"><a href="./Michael_Gläser" id="mwB7A" rel="mw:WikiLink" title="Michael Gläser">Michael Gläser</a></b> was called in to lead the <a href="./Thomanerchor" id="mwB7E" rel="mw:WikiLink" title="Thomanerchor">Thomanerchor</a> in Leipzig when its musical director <a href="./Georg_Christoph_Biller" id="mwB7I" rel="mw:WikiLink" title="Georg Christoph Biller">Georg Christoph Biller</a> fell ill?