Complex sentence: He and his family are being evicted from their apartment by their landlords, the Robesons, who believe the Robesons to be a man and wife, who call themselves Mommy and Daddy.
Split into simpler sentences: He and his family are being evicted from their apartment by their landlords, the Robesons. We believe the Robesons to be man and wife, who call themselves Mommy and Daddy.