Based on prior knowledge, it is difficult to determine a direct relationship between chronic pneumonia in the anamnesis (feature "zab_leg_04") and the presence of chronic heart failure in the myocardial infarction complications data. However, we can still analyze the distribution of "zab_leg_04" values for each target class to understand any potential patterns.

To analyze the relationship between "zab_leg_04" and chronic heart failure, we can examine the distribution of "zab_leg_04" values for each target class (yes and no) in the myocardial infarction complications data.

Here is the dictionary with the distribution of "zab_leg_04" values for each target class:

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

In the "no" class, the only available value for "zab_leg_04" is "no". On the other hand, in the "yes" class, we have both "no" and "yes" values for "zab_leg_04".