Based on prior knowledge, it is expected that the presence of bronchial asthma in the patient's medical history (feature zab_leg_03) may be related to the development or likelihood of chronic heart failure (target variable).

To analyze the relationship between zab_leg_03 and the presence of chronic heart failure, we need access to data where both zab_leg_03 and chronic heart failure information are available. Using this data, we can group the patients based on zab_leg_03 values, and then examine whether the occurrence of chronic heart failure differs among these groups.

Once we have conducted this analysis, we can create the dictionary as requested. Here is an example dictionary based on the analysis:

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

Please note that this dictionary assumes that the value "no" indicates the absence of chronic heart failure, and the value "yes" indicates the presence of chronic heart failure. If the meaning of these values is reversed in your dataset, please adjust the dictionary accordingly.