Based on prior knowledge, the feature "contact" refers to the medium of communication used while contacting the client. It can take on three categorical values: 'unknown', 'cellular', and 'telephone'.

To analyze the relationship between the feature "contact" and the task of whether the client subscribes to a term deposit, we can look at the distribution of each contact type within the two target classes: 'no' and 'yes'.

Here's the analysis:

- For clients who do not subscribe to a term deposit ('no'), the possible values of the feature "contact" are ['unknown', 'cellular', 'telephone'].

- For clients who subscribe to a term deposit ('yes'), the possible values of the feature "contact" are ['cellular', 'telephone'].

Based on this analysis, here is the dictionary:

```json
{
	"no": ["unknown", "cellular", "telephone"],
	"yes": ["cellular", "telephone"]
}
```

Please note that the value 'unknown' is included in the 'no' target class as it is one of the possible values for the feature "contact".