Based on prior knowledge, it is expected that the presence of an anterior myocardial infarction can be a risk factor for developing chronic heart failure. Therefore, it is likely that patients with specific changes in the QRS complex, indicative of an anterior myocardial infarction, may show chronic heart failure.

Based on this relationship analysis, the dictionary can be created as follows:

```json
{
	"no": [
		"QRS is like Qr-complex",
		"QRS is like QR-complex",
		"QRS has no changes",
		"there is no infarct in this location"
	],
	"yes": [
		"QRS is like QS-complex"
	]
}
```

In this case, the values of the "ant_im" feature that are associated with the target class "no" are "QRS is like Qr-complex", "QRS is like QR-complex", "QRS has no changes", and "there is no infarct in this location". The value "QRS is like QS-complex" is associated with the target class "yes".