Complex sentence: By 1898, the year Iowa legalized the practice of osteopathy, Still started his own school in Des Moines, the second such osteopathic school in the nation, with the help of his professional partner and wife, Ella Daugherty Still, a respected gynecologist and teacher.
Split into simpler sentences: By 1898, the year Iowa legalized the practice of osteopathy, Still was in Des Moines to start his own school, the second such osteopathic school in the nation. At his side was his professional partner and wife, Ella Daugherty Still, a respected gynecologist and teacher.