《北史·列传·卷八》
他父亲的姑姑是平文帝的皇后，生下昭成皇帝。
祖姑为平文后，生昭成皇帝。
His father's aunt was the Empress of Emperor Pingwen and gave birth to Emperor Zhaocheng.
<s>[INST] Transpose the following Modern Chinese text into Classical Chinese: 他父亲的姑姑是平文帝的皇后，生下昭成皇帝。 [/INST] 祖姑为平文后，生昭成皇帝。</s>
Transpose the following Modern Chinese text into Classical Chinese: 他父亲的姑姑是平文帝的皇后，生下昭成皇帝。
user
祖姑为平文后，生昭成皇帝。
assistant