Complex sentence: Dorothy Lonewolf Miller (1920-2003) was a Blackfoot activist from Iowa who was a union organizer, social worker and health care advocate who participated in the Alcatraz occupation, providing support at the health clinic established on the island.
Split into simpler sentences: Dorothy Lonewolf Miller (1920-2003) was a Blackfoot activist from Iowa. She was a union organizer, social worker and health care advocate, who participated in the Alcatraz occupation, providing support at the health clinic established on the island.