sentences:  Aritz Aduriz, Andoni Iraola and Ander Murillo were also youth products of Antiguoko, and went on to later appear professionally with Real Sociedad's Basque neighbours Athletic Bilbao, a club which had a formal agreement with Antiguoko for several seasons and continues to acquire its players on a regular basis.The "Juvenil A" squad play in the Group II of the División de Honor Juvenil de Fútbol.The opponents in the league group include the academy teams of Athletic Bilbao, Real Sociedad and Osasuna, other clubs whose adult departments compete at various levels from La Liga down to Tercera División, and another strong youth-only organisation, Danok Bat.