Complex sentence: The sugar factory had been a major source of employment in North Galway, and then Archbishop of Tuam, Joseph Cassidy convened a meeting to discuss the issue of unemployment, at which a task group was formed.
Split into simpler sentences: The sugar factory was a major source of employment in North Galway. The then Archbishop of Tuam, Joseph Cassidy convened a meeting to discuss the issue of unemployment, at which a task group was formed.