Based on prior knowledge, white blood cell count (L_BLOOD) can be used as an indicator of inflammation or infection in the body. Chronic heart failure, on the other hand, is a specific condition related to the heart's inability to pump blood effectively.

To analyze the relationship between L_BLOOD and chronic heart failure, we would ideally compare the white blood cell count values between patients with and without chronic heart failure.

Here is an example dictionary that includes 5 typical L_BLOOD values for each target class:

```json
{
    "no": [5.2, 5.7, 6.1, 6.4, 7.0],
    "yes": [5.8, 6.2, 6.7, 7.3, 7.8]
}
```

It is important to note that this is a hypothetical example, and specific values may vary depending on the actual data and context.