Billy Mercer
...that Billy Mercer became caretaker assistant manager of Sheffield Wednesday in October 2006, having previously played for rivals Sheffield United?
...that <b id="mwEZE"><a class="mw-redirect" href="./Billy_Mercer_(footballer_born_1969)" id="mwEZI" rel="mw:WikiLink" title="Billy Mercer (footballer born 1969)">Billy Mercer</a></b> became <a href="./Caretaker_manager" id="mwEZM" rel="mw:WikiLink" title="Caretaker manager">caretaker assistant manager</a> of <a href="./Sheffield_Wednesday_F.C." id="mwEZQ" rel="mw:WikiLink" title="Sheffield Wednesday F.C.">Sheffield Wednesday</a> in October 2006, having previously played for rivals <a href="./Sheffield_United_F.C." id="mwEZU" rel="mw:WikiLink" title="Sheffield United F.C.">Sheffield United</a>?