a terrorist attack
... that the perpetrators of a terrorist attack in Aceh on New Year's Eve 2003 are still unknown?
... that the perpetrators of <b id="mwBtY"><a class="mw-redirect" href="./2003_Aceh_New_Years'_Eve_bombing" id="mwBtc" rel="mw:WikiLink" title="2003 Aceh New Years' Eve bombing">a terrorist attack</a></b> in <a href="./Aceh" id="mwBtg" rel="mw:WikiLink" title="Aceh">Aceh</a> on New Year's Eve 2003 are still unknown?