```json
{
	"no": ["no"],
	"yes": ["yes"]
}
```
Based on the feature description and the task, it appears that the feature "fibr_ter_07" represents whether the patient has received fibrinolytic therapy by Celiasum 250k IU. In the given data, the possible values for this feature are "no" and "yes".

To determine if the patient has chronic heart failure, we need to analyze the relationship between this feature and the target variable. Since the given feature is related to fibrinolytic therapy, it might not directly indicate chronic heart failure. It would be helpful to have more information about other relevant features that specifically relate to chronic heart failure in order to make a more informed analysis.