Which significant Sinn Féin politician attended the Dr. McKenna Cup?
Martin McGuinness James Martin Pacelli McGuinness (Irish: "Séamus Máirtín Pacelli Mag Aonghusa" ; 23 May 1950 – 21 March 2017) was an Irish republican and Sinn Féin politician who was the deputy First Minister of Northern Ireland from May 2007 to January 2017.
Arthur Griffith Arthur Joseph Griffith (Irish: "Art Seosamh Ó Gríobhtha" ; 31 March 1871 – 12 August 1922) was an Irish politician and writer, who founded and later led the political party Sinn Féin. He served as President of Dáil Éireann from January to August 1922, and was chairman of the Irish delegation at the negotiations in London that produced the Anglo-Irish Treaty of 1921.