Based on prior knowledge, the relationship between the feature L_BLOOD (White blood cell count) and the occurrence of chronic heart failure in myocardial infarction complications can be analyzed as follows:

L_BLOOD values are used to measure the concentration of white blood cells in the patient's blood. Abnormal values can indicate underlying health conditions. In the context of chronic heart failure, which is a long-term condition, L_BLOOD levels may vary depending on the severity and progression of the disease.

To determine the appropriate ranges of values, it is necessary to consult medical literature or domain experts. However, in general, normal values for white blood cell count can range from 4.5 to 11 billion per liter.

Now, let's create a dictionary with typical L_BLOOD values for each target class:

```json
{
	"no": [7.2, 8.4, 6.9, 5.6, 10.3],
	"yes": [11.8, 10.9, 9.5, 8.1, 9.7]
}
```
Please note that these values are just examples and may not represent the actual relationship between L_BLOOD and chronic heart failure accurately.