《明史·列传·卷九十四》
过去窦宪改沁水园，终以叛逆诛伐。
昔窦宪改沁水园，卒以逆诛。
In the past, Dou Xian reformed the Qinshui Garden, and finally was executed for treason.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 昔窦宪改沁水园，卒以逆诛。 [/INST] In the past, Dou Xian reformed the Qinshui Garden, and finally was executed for treason.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 昔窦宪改沁水园，卒以逆诛。
user
In the past, Dou Xian reformed the Qinshui Garden, and finally was executed for treason.
assistant