Complex sentence: In short time, the Ceili Festival featured many of the finest Irish performers from around the globe, became the largest-attended one-day Irish festival in this country, and expanded to a three-day festival in recent years.
Split into simpler sentences: In short time, the Ceili Festival featured many of the finest Irish performers from around the globe, became the largest-attended one-day Irish festival in this country. It has expanded to a three-day festival in recent years.