Based on my prior knowledge, there may be a relationship between obesity and chronic heart failure. Obesity is a known risk factor for various cardiovascular diseases, including heart failure. Therefore, it is likely that patients with obesity in their medical history may have a higher likelihood of developing chronic heart failure.

To analyze the relationship between the feature "endocr_02" (Obesity in the anamnesis) and the task of determining whether the patient shows chronic heart failure, we need to examine the association between the values of "endocr_02" and the presence or absence of chronic heart failure.

Here is the dictionary with the possible values of "endocr_02" for each target class:

```json
{
	"no": ["no"],  
	"yes": ["yes"]  
}
```

Note that since "endocr_02" is a categorical variable with only two possible values, "no" and "yes", we include these values in the respective lists for each target class. If there were additional values beyond "no" and "yes", we would include them as well. However, since the feature is related to obesity, which is a known risk factor for chronic heart failure, it is unlikely that there would be other values in this case.

In summary, based on the feature description and prior knowledge, the dictionary suggests that having a history of obesity (endocr_02 = "yes") increases the likelihood of chronic heart failure.