a concert in Sarajevo
... that when U2 played a concert in Sarajevo in 1997 , they attempted to include all the conflicting ethnicities of the region in the audience?
... that when <a href="./U2" id="mwDOQ" rel="mw:WikiLink" title="U2">U2</a> played <b id="mwDOU"><a class="mw-redirect" href="./1997_U2_concert_in_Sarajevo" id="mwDOY" rel="mw:WikiLink" title="1997 U2 concert in Sarajevo">a concert in Sarajevo</a></b> in 1997 <i id="mwDOc">(concert stage pictured)</i>, they attempted to include all the conflicting <a href="./Ethnic_groups_in_Bosnia_and_Herzegovina" id="mwDOg" rel="mw:WikiLink" title="Ethnic groups in Bosnia and Herzegovina">ethnicities of the region</a> in the audience?