Based on prior knowledge, there is no direct relationship between the feature "np_01" (First-degree AV block in the anamnesis) and the target variable "chronic heart failure." Therefore, we cannot determine if the presence of a first-degree AV block in the patient's anamnesis indicates the presence or absence of chronic heart failure.

As such, the dictionary would be as follows:

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

Since the feature "np_01" has only one category, which is "no," we represent it as ["no"] for both target classes "no" and "yes" to indicate that the presence of a first-degree AV block is not indicative of chronic heart failure.