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

To do this, we will examine the values of the "NITR_S" feature for both the "no" and "yes" targets.

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

Based on this analysis, the feature "NITR_S" has the following relationship with the presence of chronic heart failure:

- For the "no" target class, the only possible value of "NITR_S" is "no".

- For the "yes" target class, both "no" and "yes" are possible values of "NITR_S".

Note that we have only included the possible values in the dictionary and have excluded any values that are hard to predict.