Complex sentence: Erdrich comes from a family of writers: among seven siblings, her sister Louise Erdrich is one of the most renowned contemporary Native American writers; another sister, Lise Erdrich, is also published.
Split into simpler sentences: Erdrich comes from a family of writers: among seven siblings, her sister Louise Erdrich is one of the most renowned contemporary Native American writers. Another sister, Lise Erdrich, is also published.