About Annotation json files

[Jyerim]

I have a question about the annotation files. What's the difference between count_train and unseen_count_train?
From what I understand, count_train has same classes with count_val and count_test, while unseen_count_train and unseen_count_test don't share classes.
So, would it be appropriate to use the unseen_count_train.json for a few-shot setting?
Also, is the model in Tab.9 trained using unseen_count_train.json and evaluated using unseen_count_test.json?