```json
{
	"no": ["no"], 
	"yes": ["yes"]
}
```
Based on prior knowledge, the feature "ASP_S_n" represents the use of acetylsalicylic acid in the ICU. From this feature alone, it is not possible to determine whether the patient has chronic heart failure or not. However, if we consider the target variable "myocardial infarction complications data" and use additional relevant features, it might be possible to determine if the patient has chronic heart failure or not.