《水经注·卷三十七》
刘备的孙夫人是孙权的妹妹，又改筑此城。
刘备孙夫人，权妹也。
Liu Bei's wife Sun is Sun Quan's younger sister, and rebuilt this city.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 刘备孙夫人，权妹也。 [/INST] Liu Bei's wife Sun is Sun Quan's younger sister, and rebuilt this city.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 刘备孙夫人，权妹也。
user
Liu Bei's wife Sun is Sun Quan's younger sister, and rebuilt this city.
assistant