Complex sentence: Shi Bingzhi was married to a Jurchen woman (surname Na-ho) and a Han Chinese woman (surname Chang), it is unknown which of them was Shi Tianze's mother.
Split into simpler sentences: Shi Bingzhi was married to a Jurchen woman (surname Na-ho) and a Han Chinese woman (surname Chang). It is unknown which of them was Shi Tianze's mother.