Complex sentence: He and his wife, who died in 1920, had two daughters, Conchita Sepulveda Chapman and Ora Sepulveda, and two sisters, Mrs. Thomas D. Mott and Tranquilina Sepulveda.
Split into simpler sentences: He and his wife, who died in 1920, had two daughters, Conchita Sepulveda Chapman and Ora Sepulveda. He had two sisters, Mrs. Thomas D. Mott and Tranquilina Sepulveda.