Guido Castelnuovo
...that Italian mathematician Guido Castelnuovo secretly taught geometry to Jewish students during World War II?
...that <a href="./Italy" id="mwA3U" rel="mw:WikiLink" title="Italy">Italian</a> <a href="./Mathematics" id="mwA3Y" rel="mw:WikiLink" title="Mathematics">mathematician</a> <b id="mwA3c"><a href="./Guido_Castelnuovo" id="mwA3g" rel="mw:WikiLink" title="Guido Castelnuovo">Guido Castelnuovo</a></b> secretly taught <a href="./Geometry" id="mwA3k" rel="mw:WikiLink" title="Geometry">geometry</a> to <a class="mw-redirect" href="./Jew" id="mwA3o" rel="mw:WikiLink" title="Jew">Jewish</a> students during <a href="./World_War_II" id="mwA3s" rel="mw:WikiLink" title="World War II">World War II</a>?