Complex sentence: Merkerson, the youngest of five children, was born in Saginaw, Michigan, the daughter of Ann Merkerson, who at the time was the only female in the vehicles operation unit at the Detroit Post Office.
Split into simpler sentences: Merkerson, the youngest of five children, was born in Saginaw, Michigan. Her mother, Ann, was, at the time, the only female in the vehicles operation unit at the Detroit Post Office.