Analyzing the relationship between the feature "L_BLOOD" and the task of determining if the patient shows chronic heart failure requires prior knowledge about the ranges of values for white blood cell count.

Typical ranges for white blood cell count are as follows:
- Normal range: 4.5-11.0 billion per liter
- Mild leukocytosis (increased count): > 11.0 billion per liter
- Mild leukopenia (decreased count): < 4.5 billion per liter

Based on this knowledge, we can analyze how the feature "L_BLOOD" relates to the target variable "chronic heart failure."

Here is the dictionary with the specific details of the relationship:

```json
{
	"no": [5.0, 6.2, 7.3, 8.1, 9.4],
	"yes": [11.5, 12.7, 13.8, 15.2, 17.9]
}
```

In this dictionary, for the target class "no" (indicating no chronic heart failure), we have provided a list of 5 typical values of the feature "L_BLOOD" that are within the normal range (4.5-11.0 billion per liter).

For the target class "yes" (indicating chronic heart failure), we have provided a list of 5 typical values of the feature "L_BLOOD" that are above the normal range (> 11.0 billion per liter).

Please note that these values are just examples and may not accurately represent the actual data. It is recommended to consult the dataset to obtain the real values for accurate analysis.