Based on prior knowledge, the feature n_r_ecg_p_08 represents the presence or absence of Paroxysms of supraventricular tachycardia on ECG at the time of admission to the hospital. It is a categorical variable with two categories: 'no' and 'yes'. 

To analyze the relationship between this feature and the presence of chronic heart failure, we need to examine the distribution of n_r_ecg_p_08 values for both cases where chronic heart failure is present and where it is not present. 

Based on the available information, we can construct the dictionary as follows:

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

Please note that it is not necessary to include values that are hard to predict in the dictionary.