Based on prior knowledge, chronic pneumonia in the anamnesis (zab_leg_04) can potentially be a risk factor for chronic heart failure. Let's conduct an analysis to determine the relationship between the feature and the task.

To analyze the relationship between zab_leg_04 and chronic heart failure, we need data on patients with myocardial infarction complications and their zab_leg_04 values.

Assuming we have access to this data, we can analyze the relationship as follows:

1. For patients with myocardial infarction complications and zab_leg_04 value 'no':
   - Check if there are patients in this group who show chronic heart failure. If there are, then the answer to the task would be 'yes'. If not, the answer would be 'no'.
   - Create a list of string with values 'no' to represent the possible values of zab_leg_04 for the target class 'no'.

2. For patients with myocardial infarction complications and zab_leg_04 value 'yes':
   - Check if there are patients in this group who show chronic heart failure. If there are, then the answer to the task would be 'yes'. If not, the answer would be 'no'.
   - Create a list of string with values 'yes' to represent the possible values of zab_leg_04 for the target class 'yes'.

Based on the analysis, we can generate the dictionary in the required format:

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

Please note that this analysis assumes availability of data on patients with myocardial infarction complications and their zab_leg_04 values, as well as information on whether they show chronic heart failure or not.