In what year was the team founded that won the 1956-1957 Irish League championship?
Glenavon F.C. Glenavon Football Club is a semi-professional, Northern Irish football club playing in the NIFL Premiership. The club, founded in 1889, hails from Lurgan and plays its home matches at Mourneview Park. Club colours are blue and white. Gary Hamilton has been player-manager of the Lurgan Blues since December 2011 following the resignation of Marty Quinn.
Clarence F.C. Clarence Football Club is a former Irish football club based in the Belfast. It was founded in 1882 and was a founding member of the Irish Football League in 1890. The club resigned at the start of the 1891-92 season without playing any matches, having been unable to raise a team for its opening fixture. By the end of the 1891-92 season the club had folded.