Based on the given feature description and task, the feature "GB" represents the presence of essential hypertension and we need to determine if it is related to chronic heart failure in the patient.

To analyze the relationship between the feature "GB" and the target variable (presence of chronic heart failure), we would examine the data and observe the distribution of different levels of essential hypertension (GB) among patients with and without chronic heart failure.

Assuming we have access to a dataset with this information, we would look for patterns or trends in the data that can help us understand the relationship. By comparing the distribution of GB values for patients with and without chronic heart failure, we can find insights and make predictions.

Based on the analysis, we can generate a dictionary with the relevant information:

```json
{
	"no": ["there is no essential hypertension"], 
	"yes": ["Stage 2", "Stage 3", "Stage 1"]
}
```

Please note that this is a hypothetical example, and the actual relationship between GB and chronic heart failure would require a thorough analysis of the data to determine the accuracy of the relationship.