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?
Sentence (from "Asano clan"): The Main Lineage ("sōke", 宗家) were Lords (daimyō) of the Hiroshima Domain in Aki Province and another famous branch family were Lords of the Akō Domain in Harima Province associated with the story of the Forty-seven rōnin.
Relevant evidence: Yes