sentences:  In subsequent years the status of the Olympic Games football competition was downgraded and as a result this game is widely regarded as the Irish Free State's first official game.The 1930s saw the erosion of Dublin's dominance in the league.During the 20s, Bohemians, St James's Gate, Shelbourne and Shamrock Rovers had a monopoly over the domestic game, but Dundalk and Sligo Rovers both won championships while Cork F.C.