The 2015 Ulster Club Senior Football Championship had reigning champions of which Gaelic club?
Slaughtneil GAC: Robert Emmet's Gaelic Athletic Club Slaughtneil (Irish: "CLG Roibeard Éiméid Sleacht Néill" ) is a Gaelic Athletic Association club based on the townland of Slaughtneil, County Londonderry, Northern Ireland.
i don't know