stayed alight under water
... that the Olympic Flame once burned at 2,000 degrees Celsius to ensure that it stayed alight under water?
... that the <a class="mw-redirect" href="./Olympic_Flame" id="mwB0o" rel="mw:WikiLink" title="Olympic Flame">Olympic Flame</a> once burned at 2,000 degrees Celsius to ensure that it <b id="mwB0s"><a href="./2000_Summer_Olympics_torch_relay" id="mwB0w" rel="mw:WikiLink" title="2000 Summer Olympics torch relay">stayed alight under water</a></b>?