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

Based on the given categorical feature "fibr_ter_02" and the task of determining if the patient has chronic heart failure, the feature doesn't provide any additional information or relationship to the target variable. The only possible values for this feature are "no" and "yes", and it is not possible to determine the presence of chronic heart failure solely based on this feature. Therefore, there is no meaningful relationship between the feature "fibr_ter_02" and the target variable.