《后汉书·列传·酷吏列传》
董宣知道了，便把公孙丹子逮捕杀掉。
宣知，即收丹父子杀之。
When Dong Xuan found out, he arrested and killed Gongsun Danzi.
<s>[INST] Explain the meaning of this Classical Chinese passage in English: 宣知，即收丹父子杀之。 [/INST] When Dong Xuan found out, he arrested and killed Gongsun Danzi.</s>
Explain the meaning of this Classical Chinese passage in English: 宣知，即收丹父子杀之。
user
When Dong Xuan found out, he arrested and killed Gongsun Danzi.
assistant