Based on prior knowledge, we can analyze the relationship between the feature "endocr_01" (Diabetes mellitus in the anamnesis) and the presence of chronic heart failure in the myocardial infarction complications data.

It is known that diabetes mellitus is a risk factor for the development of chronic heart failure. Therefore, it is likely that patients with a history of diabetes mellitus (endocr_01 = 'yes') may have a higher likelihood of showing chronic heart failure.

To analyze this relationship, we will examine the distribution of endocr_01 values for both target classes (yes and no) in the dataset.

Please find below the dictionary with the possible values of the feature "endocr_01" for each target class:

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

Since the feature "endocr_01" is a categorical variable with only two possible categories ('no' and 'yes'), we can conclude that patients with chronic heart failure in the myocardial infarction complications data have a history of diabetes mellitus.