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

Based on the feature description and task, it seems that the only possible value for feature nr_02 in the dataset is either "no" or "yes". Therefore, the relationship between the feature and the task can be analyzed as follows:

- If the value of nr_02 is "no", it indicates that there are no premature ventricular contractions in the anamnesis. In this case, the myocardial infarction complications data does not show chronic heart failure.
- If the value of nr_02 is "yes", it indicates that there are premature ventricular contractions in the anamnesis. In this case, further analysis would be required to determine if the myocardial infarction complications data shows chronic heart failure.

As there are no other possible values for nr_02 mentioned in the feature description, we can create a dictionary with the possible values for each target class:

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

This dictionary represents the possible values of feature nr_02 for each target class.