Based on prior knowledge, it is difficult to determine the relationship between the feature "STENOK_AN" (Exertional angina pectoris in the anamnesis) and the task of identifying chronic heart failure. Angina pectoris refers to chest pain or discomfort caused by reduced blood flow to the heart muscle, typically due to coronary artery disease. While angina pectoris is associated with heart problems, it does not exclusively imply chronic heart failure.

Nonetheless, we can analyze the available categories of "STENOK_AN" and determine the values that are likely to be associated with chronic heart failure. 

After conducting a thorough analysis, the following dictionary can be created:

```json
{
    "no": ["never"],
    "yes": ["during the last year","more than 5 years ago", "4-5 years ago", "one year ago", "two years ago", "three years ago"]
}
```

In this dictionary, we include the values of "STENOK_AN" that are more likely to be associated with chronic heart failure in the "yes" category. The "no" category includes the value "never", indicating that the absence of exertional angina pectoris in the anamnesis may indicate the absence of chronic heart failure.