Question: Eileen Elizabeth Sheridan was known for her association with a firm headed by  English gangsters who were the foremost perpetrators of what in the East End of London?
Sentence (from "Kray twins"): With their gang, the Firm, the Krays were involved in armed robberies, arson, protection rackets, assaults and the murders of Jack "the Hat" McVitie and George Cornell.
Relevant evidence: No