Based on prior knowledge, we can analyze the relationship between the number of persons the car can carry and the decision to buy the car. 

It is reasonable to assume that the decision to buy a car would be influenced by the capacity of the car to accommodate the required number of people. 

A car with a larger capacity (e.g., "more" than 4 persons) would likely be more attractive to buyers who have a need to transport more people. On the other hand, a car with a smaller capacity (e.g., 2 persons) may be preferred by individuals or couples who do not often require transportation for large groups. 

To analyze the relationship more specifically, we will examine the potential values of the "persons" feature for each target class:

- For the "unacceptable" target class, it is difficult to predict specific values of the "persons" feature that would lead to an unacceptable rating. However, it is reasonable to assume that cars with a greater capacity (e.g., "more") would generally be preferred by this class.

- For the "acceptable" target class, people who consider the decision to buy the car as "acceptable," may prefer cars with a capacity of 2 or 4 persons, as these options are sufficient for their needs.

- For the "very good" target class, cars with larger capacities (e.g., "more" persons) are likely to receive higher ratings as they can accommodate more people.

- For the "good" target class, cars with a capacity of 4 persons may be preferred as they strike a balance between accommodating small groups and maintaining a compact size.

Based on this analysis, we can create the required dictionary:

```json
{
	"unacceptable": ["2", "4", "more"],
	"acceptable": ["2", "4"],
	"very good": ["more"],
	"good": ["4"]
}
```

Note that we have included all possible values for each target class, even though it may be difficult to predict exact values for some classes.