Analysis:
To determine the relationship between feature AST_BLOOD and the presence of chronic heart failure (target variable), we can analyze the distribution of AST_BLOOD values for each target class. 

Since the feature is described as Serum AsAT content, prior knowledge suggests that higher values may indicate liver or heart damage. However, without additional information, it is difficult to determine specific ranges of values for chronic heart failure.

To proceed with the analysis, we will assume that low AST_BLOOD values are less likely to be associated with chronic heart failure, while higher values may be indicative of its presence.

Based on this analysis, we will create a dictionary with the possible values of AST_BLOOD for each target class. We will include 5 typical AST_BLOOD values for both the 'no' and 'yes' classes.

Dictionary:
```json
{
	"no": [23.5, 32.1, 41.7, 28.9, 35.2],
	"yes": [53.8, 62.4, 48.6, 57.2, 53.1]
}
```
Please note that the values provided are arbitrary and hypothetical, as we do not have specific information on the relationship between AST_BLOOD and chronic heart failure for this particular dataset.