Based on the feature description and task, the DLIT_AG feature represents the duration of arterial hypertension for each patient. To analyze the relationship between this feature and the presence of chronic heart failure, we can examine the distribution of DLIT_AG values for each target class.

Here is the analysis and resulting dictionary:

```json
{
	"no": ["there was no arterial hypertension"],
	"yes": ["more than 10 years", "6-10 years", "three years", "two years", "one year", "five years", "four years"]
}
```

Explanation:
- For the target class "no", indicating no chronic heart failure, the only DLIT_AG value is "there was no arterial hypertension". This suggests that patients without chronic heart failure tend to have no history of arterial hypertension.
- For the target class "yes", indicating the presence of chronic heart failure, there are multiple DLIT_AG values. Patients with chronic heart failure may have a history of arterial hypertension lasting more than 10 years, 6-10 years, three years, two years, one year, five years, or four years.

Note:
- Since the feature values are categorical and have specific categories, we only include the categories that are relevant to each target class. For the target class "no", only the category "there was no arterial hypertension" is included, as the other categories are not applicable in this case. 

Please let me know if I can help you with anything else.