Based on my prior knowledge, premature ventricular contractions (PVCs) are abnormal heartbeats that begin in the lower chambers (ventricles) of the heart. These contractions can be observed in individuals with various heart conditions, including chronic heart failure.

To analyze the relationship between the feature "nr_02" (Premature ventricular contractions in the anamnesis) and the task of determining if the patient shows chronic heart failure, we can consider the following possibilities:

1. If the value of "nr_02" is "no", it suggests that there are no premature ventricular contractions in the patient's medical history. This could indicate a lower likelihood of chronic heart failure.
2. If the value of "nr_02" is "yes", it suggests that there are premature ventricular contractions present in the patient's medical history. This could indicate a higher likelihood of chronic heart failure.

Based on this analysis, the dictionary can be constructed as follows:

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

The list of values for "nr_02" in the target class "no" would only include "no", indicating that if the patient does not have premature ventricular contractions in their medical history, it is less likely to show chronic heart failure. Similarly, the list of values for "nr_02" in the target class "yes" would only include "yes", indicating that if the patient has premature ventricular contractions in their medical history, it is more likely to show chronic heart failure.