sentences:  These changes were mainly made in an effort to better performances in European competition by League of Ireland clubs.The improvements provided by professionalism, particularly in fitness, produced significantly better results in European competition, but proved to be somewhat unsustainable for some clubs, with the vast majority of the clubs involved suffering severe financial collapses but these clubs have been outpassed by more financially stable clubs and the league has kept up its impressive performances.In 2006 the FAI completed a merge with the League of Ireland.