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

The feature "n_p_ecg_p_11" is a categorical variable with two possible values: "no" and "yes". 

Based on the available information, we can see that the value of "n_p_ecg_p_11" is directly related to the occurrence of chronic heart failure. 

For the target class "no" (indicating no chronic heart failure), the only possible value for "n_p_ecg_p_11" is "no". 

For the target class "yes" (indicating chronic heart failure), the only possible value for "n_p_ecg_p_11" is "yes". 

Since there are no other values mentioned for this feature and target, the lists for each target class only contain a single value.