Based on my prior knowledge, chronic heart failure can be associated with changes in white blood cell count. However, it is important to note that white blood cell count alone is not sufficient to diagnose chronic heart failure. Additional clinical information and diagnostic criteria should be considered for a more accurate diagnosis.

To analyze the relationship between L_BLOOD (white blood cell count) and the presence of chronic heart failure, we can compare the typical values of L_BLOOD for patients with and without chronic heart failure.

Here is the dictionary with typical L_BLOOD values for each target class:

```json
{
	"no": [4.2, 4.5, 4.8, 5.1, 5.4],
	"yes": [5.9, 6.2, 6.5, 6.8, 7.1]
}
```

Please note that these values are examples and may vary depending on specific population characteristics, clinical context, and diagnostic criteria. It is always recommended to consult with a healthcare professional for accurate diagnosis and interpretation.