Complex sentence: While working for Wyeth out of Fort Hall, Joseph married a Walla Walla Indian woman, Eliza, who was a daughter of Old Chief Joseph ("Tu-eka-kas") of the Wallowa Nez Perce and a Walla Walla mother.
Split into simpler sentences: While working for Wyeth out of Fort Hall, Joseph married a Walla Walla Indian woman. Eliza was a daughter of Old Chief Joseph ("Tu-eka-kas") of the Wallowa Nez Perce and a Walla Walla mother.