Based on prior knowledge, we can analyze the relationship between the feature DLIT_AG and the presence of chronic heart failure.

Given that DLIT_AG represents the duration of arterial hypertension, it is likely that a longer duration of arterial hypertension may contribute to the development of chronic heart failure. Here is a breakdown of how the DLIT_AG categories could relate to the presence of chronic heart failure:

- 'there was no arterial hypertension': It is possible that the absence of arterial hypertension may indicate a lower likelihood of chronic heart failure. This category could be associated with the "no" class.

- 'more than 10 years': A duration of arterial hypertension for more than 10 years may suggest the possibility of chronic heart failure. This category could be associated with the "yes" class.

- '6-10 years': A duration of arterial hypertension between 6-10 years could be a moderate risk factor for chronic heart failure. This category could be associated with both the "no" and "yes" classes.

- 'three years', 'two years', 'one year', 'five years', 'four years': The relationship between these duration categories and chronic heart failure is less clear. They may not strongly predict the presence or absence of chronic heart failure.

Based on this analysis, we can create the dictionary as follows:

```json
{
	"no": ["there was no arterial hypertension"],
	"yes": ["more than 10 years"]
}
```

Please note that the other duration categories are not included in the dictionary since their relationship with chronic heart failure is not well-defined.