Björn Ambrosiani
... that Björn Ambrosiani spent six years excavating at the Viking Age settlement Birka?
... that <b id="mwBI8"><a href="./Björn_Ambrosiani" id="mwBJA" rel="mw:WikiLink" title="Björn Ambrosiani">Björn Ambrosiani</a></b> spent six years excavating at the <a href="./Viking_Age" id="mwBJE" rel="mw:WikiLink" title="Viking Age">Viking Age</a> settlement <a href="./Birka" id="mwBJI" rel="mw:WikiLink" title="Birka">Birka</a>?