Complex sentence: This was the first ever All-Ireland football final to be contested by 2 counties from the same province, in this case, Ulster; this event was only possible because of the introduction of the qualifying system in the 2001 championship.
Split into simpler sentences: This was the first ever All-Ireland football final to be contested by 2 counties from the same province; in this case, Ulster. This event was only possible because of the introduction of the qualifying system in the 2001 championship.