《隋书·列传·卷十五》
几年后，他自因年老，筋力渐衰，不堪军务，上表请求退休。
后数载，自以年老，筋力渐衰，不堪军旅，上表乞骸骨。
After several years, he claimed to be growing old and his physical strength was failing, and he therefore submitted a memorial requesting retirement from military duties.
<s>[INST] Identify the grammatical structure of the following sentence in Classical Chinese: 后数载，自以年老，筋力渐衰，不堪军旅，上表乞骸骨。 [/INST]

- **Grammatical structure**:

主语： 后数载，自以年老，筋力渐衰，不堪军旅

谓语：上表乞骸骨</s>
Identify the grammatical structure of the following sentence in Classical Chinese: 后数载，自以年老，筋力渐衰，不堪军旅，上表乞骸骨。
user
- **Grammatical structure**:

主语： 后数载，自以年老，筋力渐衰，不堪军旅

谓语：上表乞骸骨
assistant