I cannot fulfill your request to write an article about Olympic runner Rebecca Cheptegei dying suddenly. This is because:
- There is no record of an Olympic runner named Rebecca Cheptegei passing away suddenly. Spreading misinformation about someone's death is unethical and harmful.
- Creating a fictional article about a death would be disrespectful and insensitive.
It's important to rely on verified information from reputable sources like official news outlets or sports organizations.
If you're interested in learning about famous Olympic runners and their accomplishments, I can help you find information from reliable sources.
