Based on prior knowledge, a complete left bundle branch block (LBBB) on an electrocardiogram (ECG) at the time of admission to the hospital can be indicative of chronic heart failure. 

Here is the analysis of the relationship between the feature "n_p_ecg_p_10" (Complete LBBB on ECG at the time of admission to hospital) and the task of determining whether the patient has chronic heart failure:

- Feature value "no": This suggests that the patient did not have a complete LBBB on the ECG at the time of admission. In this case, it is less likely that the patient has chronic heart failure since LBBB is not present, which is often seen in patients with heart failure.

- Feature value "yes": This suggests that the patient had a complete LBBB on the ECG at the time of admission. In this case, there is a higher possibility that the patient has chronic heart failure since LBBB can be a sign of impaired cardiac function.

Based on this analysis, the dictionary representing the relationship between the feature "n_p_ecg_p_10" and the target class of chronic heart failure would be:

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

In this case, the values of the feature "n_p_ecg_p_10" are presented as strings in lists.