What is the nationality of the soccer player who was the head coach of the under-21 football team that has been playing since 1976?
Keld Bordinggaard: Keld Tande Bordinggard (born November 22, 1962) is a Danish former football (soccer) player. Keld Bordinggaard:  He was the head coach of the Danish national under-21 team from July 2006 until the U21 European Championship in June 2011.
i don't know