Based on prior knowledge, we can analyze the relationship between the feature GT_POST and the presence of chronic heart failure in myocardial infarction complications data.

Considering that GT_POST represents "Paroxysms of ventricular tachycardia at the time of admission to the intensive care unit", it is possible that patients with a history of ventricular tachycardia may be more likely to develop chronic heart failure. Therefore, it is reasonable to hypothesize that the presence of GT_POST equal to "yes" indicates a higher likelihood of chronic heart failure.

To create the desired dictionary, let's assume the target class "no" represents patients without chronic heart failure and "yes" represents patients with chronic heart failure. We can analyze the possible values of GT_POST for each target class.

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

In this case, for the target class "no," the only possible value of GT_POST is "no." For the target class "yes," both "no" and "yes" are possible values of GT_POST.