Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
石氏を筆頭とした羯族の連年の戦争と略奪を背景とし、旧後趙領の漢人に異民族への復讐を呼びかける檄文を飛ばした人物は誰？

### Response:

冉閔