base
...that in 1978, the nitrate-base film vaults of both the US National Archives and George Eastman House autoignited?
...that in <a href="./1978" id="mwA08" rel="mw:WikiLink" title="1978">1978</a>, the nitrate-<b id="mwA1A"><a href="./Film_base" id="mwA1E" rel="mw:WikiLink" title="Film base">base</a></b> film vaults of both the <a href="./National_Archives_and_Records_Administration" id="mwA1I" rel="mw:WikiLink" title="National Archives and Records Administration">US National Archives</a> and <a class="mw-redirect" href="./George_Eastman_House_Motion_Picture_Collection" id="mwA1M" rel="mw:WikiLink" title="George Eastman House Motion Picture Collection">George Eastman House</a> <a href="./Autoignition_temperature" id="mwA1Q" rel="mw:WikiLink" title="Autoignition temperature">autoignited</a>?