Based on prior knowledge, we can analyze the relationship between the feature "STENOK_AN" (Exertional angina pectoris in the anamnesis) and the task of determining if the myocardial infarction complications data of the patient show chronic heart failure. 

Since the feature describes angina pectoris, which is chest pain or discomfort, it is possible that patients who experienced angina pectoris in the past may be at a higher risk of developing chronic heart failure as a complication of myocardial infarction. However, without more specific information about the dataset and the relationship between chest pain and heart failure, it is difficult to make definitive conclusions.

Based on the provided feature categories, we can create a dictionary as follows:

```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 case, the "no" class is represented by the category "never," indicating that patients who have never experienced exertional angina pectoris in the anamnesis may not show chronic heart failure as a complication of myocardial infarction.

The "yes" class includes various categories of angina pectoris in the past, indicating a higher likelihood of developing chronic heart failure.

Please note that this analysis is purely based on the provided feature and its description. The relationship between angina pectoris and chronic heart failure in the context of the dataset may require more detailed investigation to draw precise conclusions.