only fields players with ancestry from the Basque Country
... that since 1912, Spanish association football club Athletic Bilbao only fields players with ancestry from the Basque Country?
... that since 1912, Spanish association football club <a href="./Athletic_Bilbao" id="mwAwg" rel="mw:WikiLink" title="Athletic Bilbao">Athletic Bilbao</a> <b id="mwAwk"><a href="./Athletic_Bilbao_signing_policy" id="mwAwo" rel="mw:WikiLink" title="Athletic Bilbao signing policy">only fields players with ancestry from the Basque Country</a></b>?