Ludvig Vibe
... that Ludvig Vibe left his position as professor of Greek to become principal of a secondary school?
... that <b id="mwB9E"><a href="./Ludvig_Vibe" id="mwB9I" rel="mw:WikiLink" title="Ludvig Vibe">Ludvig Vibe</a></b> left his position as professor of <a href="./Greek_language" id="mwB9M" rel="mw:WikiLink" title="Greek language">Greek</a> to become <a class="mw-redirect" href="./Principal_(school)" id="mwB9Q" rel="mw:WikiLink" title="Principal (school)">principal</a> of <a href="./Oslo_Cathedral_School" id="mwB9U" rel="mw:WikiLink" title="Oslo Cathedral School">a secondary school</a>?