imperial_examination_guest_sort_effect

imperial_examination_guest_sort_effect = {
	save_scope_value_as = {
		name = exam_invited_guests_amount
		value = {
			value = 0
			add = exam_invited_guests_amount_calc
		}
	}
	while = {
		count = scope:exam_invited_guests_amount
		random_in_list = {
			list = potential_exam_guest_list
			limit = {
				NOT = { is_in_list = characters }
			}
			add_to_list = characters
		}
	}
}

As written in game/common/scripted_effects/tgp_imperial_examination_scripted_effects.txt.