Based on the feature description and the task, we want to analyze the relationship between the feature "STENOK_AN" and the presence of chronic heart failure in the patient. 

To analyze this relationship, we can look at previous studies or medical knowledge that link exertional angina pectoris in the anamnesis to chronic heart failure. However, without prior knowledge, we can only make general assumptions based on the given categories of the feature:

1. "never": This category suggests that the patient never had exertional angina pectoris in the past. We can assume that if the patient has never experienced angina pectoris, the probability of having chronic heart failure could be low, but it is not definitive evidence.

2. "during the last year": This category indicates that the patient had experienced exertional angina pectoris within the last year. It is difficult to determine the relationship between this category and chronic heart failure without additional information.

3. "more than 5 years ago", "4-5 years ago", "one year ago", "two years ago", "three years ago": These categories suggest that the patient had experienced exertional angina pectoris in the past, but the time frame is varied. It is hard to establish a clear relationship between these categories and chronic heart failure.

Based on this analysis, we can create a dictionary with the following possible values for the "STENOK_AN" feature:

```json
{
	"no": ["never"],
	"yes": ["during the last year"]
}
```

Since there is no definitive evidence to relate the other categories to chronic heart failure, we have only included the categories that are more likely to be associated with the target variable "yes" ("during the last year") and the category that suggests a lower probability of chronic heart failure ("never").

Please note that this analysis is based on limited information and it is always recommended to consult with medical professionals or refer to more detailed studies for accurate interpretations in the context of chronic heart failure.