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

Based on the feature description, the feature `zab_leg_04` represents the presence or absence of chronic pneumonia in the patient's medical history. 

In order to analyze the relationship between this feature and the occurrence of chronic heart failure, we need to consider the likelihood of chronic pneumonia being a contributing factor to chronic heart failure.

Without additional information or specific knowledge about the relationship between chronic pneumonia and chronic heart failure, it is not possible to confidently determine whether the presence or absence of chronic pneumonia in the anamnesis indicates the presence of chronic heart failure.

Therefore, it is not necessary to include any specific values of `zab_leg_04` in the dictionary, as we cannot make any predictions about its relationship with the target variable.