```json
{
	"no": [1, 2, 3, 4, 5],
	"yes": [9, 10, 11, 12, 13]
}
```

Based on prior knowledge, the feature "educational-num" represents the highest level of education achieved in numerical form. To determine the relationship between this feature and the target variable, we can examine typical educational levels for each target class.

For the "no" class (earnings less than or equal to 50000 dollars per year), typical educational-num values could include 1 (Preschool), 2 (1st-4th grade), 3 (5th-6th grade), 4 (7th-8th grade), and 5 (9th grade).

For the "yes" class (earnings greater than 50000 dollars per year), typical educational-num values could include 9 (Some high school), 10 (High school graduate), 11 (Some college but no degree), 12 (Associate's degree), and 13 (Bachelor's degree).

Please note that these values are suggestions based on prior knowledge and may vary depending on the dataset being analyzed.