Based on prior knowledge, the marital status can be a relevant factor in determining whether a client subscribes to a term deposit. Here's a dictionary representing the relationship between the feature "marital" and the task "Does this client subscribe to a term deposit?":

```json
{
	"no": ["married", "single", "divorced"],  
	"yes": ["single"]  
}
```

In this case, clients who are single are more likely to subscribe to a term deposit, while clients who are married or divorced are more likely not to subscribe. Although it is not necessary to include the marital values of "married" and "divorced" in the "yes" list, the purpose of this dictionary is to provide a comprehensive overview of the relationship.