Question: The Lords of the Akō Domain in Harima Province associated with the story of what 18th-century historical event in Japan in which a band of "rōnin" (leaderless samurai) avenged the death of their master?
{'answer': 'forty-seven "rōnin"', 'supporting_facts': [['Asano clan', 1], ['Forty-seven rōnin', 0]]}