《明史·列传·卷四十五》
夏天发生瘟疫，他将犯轻罪的放出监狱，对他们说： 叫你们时再来。 
暑疫，悉遣轻系者，曰： 召汝则至。 
When there was a plague in the summer, he released prisoners who committed petty crimes, and told them: I will notify you to come back then.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 暑疫，悉遣轻系者，曰： 召汝则至。  [/INST] When there was a plague in the summer, he released prisoners who committed petty crimes, and told them: I will notify you to come back then.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 暑疫，悉遣轻系者，曰： 召汝则至。
user
When there was a plague in the summer, he released prisoners who committed petty crimes, and told them: I will notify you to come back then.
assistant