```json
{
	"no": ["no"],
	"yes": ["yes"]
}
```
Based on the feature description and task, it appears that the feature ASP_S_n represents the use of acetylsalicylic acid in the ICU for a patient. In order to determine the relationship between this feature and the presence of chronic heart failure, we need more information about the data and how it was collected. 

However, assuming that the feature is a reliable indicator of the use of acetylsalicylic acid in the ICU, it is possible to make some assumptions about its relationship with chronic heart failure.

In this case, the feature has two possible categories: "yes" and "no". Without further information, it is difficult to predict specifically which category would correspond to chronic heart failure. 

Therefore, the dictionary provided includes all possible values of the ASP_S_n feature for both the "yes" and "no" classes. This allows for flexibility in interpreting the relationship between the feature and the presence of chronic heart failure.