Complex sentence: The Tribe is made up of descendants of Algonquian-speaking Nanticoke and Lenape who remained, or returned, to their ancient homeland; many of their relatives suffered removals and forced migrations to the mid-western United States and Canada.
Split into simpler sentences: The Tribe is made up of descendants of Algonquian-speaking Nanticoke and Lenape who remained in, or returned to, their ancient homeland. Many of their relatives suffered removals and forced migrations to the Mid-Western United States and Canada.