《北史·列传·卷四十八》
他的祖先是北魏的别部，居住在库斛真水。
其先魏之别部，居库斛真水。
His ancestors were from a separate tribe in Beiwei and lived in Kuhuzhen.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 其先魏之别部，居库斛真水。 [/INST] His ancestors were from a separate tribe in Beiwei and lived in Kuhuzhen.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 其先魏之别部，居库斛真水。
user
His ancestors were from a separate tribe in Beiwei and lived in Kuhuzhen.
assistant