Based on my prior knowledge, premature atrial contractions in the anamnesis (feature nr_01) can be related to chronic heart failure. However, it is important to note that premature atrial contractions alone may not be sufficient to determine the presence of chronic heart failure. Therefore, additional analysis may be required to assess the relationship between this feature and the presence of chronic heart failure.

Here is the dictionary generated based on the analysis:

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

Since the feature is a categorical variable with two categories ('no' and 'yes'), the dictionary includes the possible values of feature nr_01 for each target class. In this case, the feature value 'no' is associated with the target class 'no', and the feature value 'yes' is associated with the target class 'yes'.