Complex sentence: Iron Tail joined the Ghost Dance movement and was in Spotted Elk's band along with his parents, siblings, wife and child and was present at the Wounded Knee Massacre where he was shot and some of his family, including his wife and child were killed.
Split into simpler sentences: Iron Tail joined the Ghost Dance movement and was in Spotted Elk's band along with his parents, siblings, wife and child. He and his family were present at the Wounded Knee Massacre, where he was shot and some of his family, including his wife and child were killed.