Based on prior knowledge, education level can be a significant factor in determining a person's income. Typically, individuals with higher levels of education tend to earn more than those with lower levels of education. Therefore, it is reasonable to assume that there would be a positive relationship between education level and earning more than 50000 dollars per year.

Here is the dictionary with the relationship between the feature "education" and the task "Does this person earn more than 50000 dollars per year?"

```json
{
	"no": ["7th-8th", "9th", "10th", "11th", "12th", "HS-grad", "Some-college"], 
	"yes": ["Bachelors", "Masters", "Doctorate", "Prof-school"]
}
```

The possible values of the feature "education" for the target class "no" (earning less than or equal to 50000 dollars per year) are: "7th-8th", "9th", "10th", "11th", "12th", "HS-grad", and "Some-college".

The possible values of the feature "education" for the target class "yes" (earning more than 50000 dollars per year) are: "Bachelors", "Masters", "Doctorate", and "Prof-school".