Based on the feature description and task, we want to examine the relationship between the feature "STENOK_AN" and the occurrence of chronic heart failure.

To analyze this relationship, we would look at the distribution of the feature values for patients with and without chronic heart failure, specifically for the "myocardial infarction complications data" of the patient.

Here is a breakdown of the possible values of the feature "STENOK_AN" and their relevance to chronic heart failure:

- "never": It is possible for patients with chronic heart failure to have never experienced exertional angina pectoris. Therefore, this value can be relevant for both "yes" and "no" classes.

- "during the last year": This value indicates that the patient experienced exertional angina pectoris within the last year. It can be relevant for both classes, as angina pectoris can be associated with chronic heart failure.

- "more than 5 years ago": Patients who experienced exertional angina pectoris more than 5 years ago may or may not have chronic heart failure. This value can be relevant for both classes.

- "4-5 years ago": Similar to the previous value, patients who had exertional angina pectoris 4-5 years ago may or may not have chronic heart failure. This value can be relevant for both classes.

- "one year ago": This value indicates that the patient experienced exertional angina pectoris exactly one year ago. It can be relevant for both classes.

- "two years ago": Similar to the previous value, patients who had exertional angina pectoris two years ago may or may not have chronic heart failure. This value can be relevant for both classes.

- "three years ago": Similar to the previous values, patients who had exertional angina pectoris three years ago may or may not have chronic heart failure. This value can be relevant for both classes.

Based on this analysis, we can create the following dictionary:

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

Please note that this dictionary includes all possible values of the feature "STENOK_AN" for both the "yes" and "no" target classes.