```json
{
    "no": ["male", "female"],
    "yes": ["female"]
}
```
Based on my prior knowledge, it is possible that both males and females can have chronic heart failure, so the feature "SEX" alone may not be a strong predictor of chronic heart failure. However, based on the available data, the patients who experienced myocardial infarction complications and had chronic heart failure are only females. Therefore, in this specific dataset, the value "female" appears to be associated with chronic heart failure.