《明史·本纪·卷十八》
五月十六日，李本因父母丧事去职。
五月乙亥，李本以忧去。
On May 16th, Li Ben retired due to the death of his parents.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 五月乙亥，李本以忧去。 [/INST] On May 16th, Li Ben retired due to the death of his parents.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 五月乙亥，李本以忧去。
user
On May 16th, Li Ben retired due to the death of his parents.
assistant