Based on prior knowledge, chronic bronchitis in the anamnesis (feature zab_leg_01) may have a possible relationship with chronic heart failure, which is the target variable. To analyze this relationship, we need to examine the distribution of zab_leg_01 values for each target class.

Here is the analysis and resulting dictionary:

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

Explanation:

- For the target class "no", the possible value for zab_leg_01 is "no".
- For the target class "yes", the possible values for zab_leg_01 are both "no" and "yes".

Please note that this analysis is based on the information provided. If there are other factors or features that play a role in determining chronic heart failure, further analysis may be required.