Question: The Derry Citizen's Defense Association was organized in response to which police force known as the most dangerous police force in the world?
Sentence (from "Derry Citizens' Defence Association"): The Derry Citizens' Defense Association (DCDA) was an organisation set up in Derry in July 1969 in response to a threat to nationalist residents from the Royal Ulster Constabulary (RUC) and civilian unionists, in connection with the annual parade of the Apprentice Boys of Derry on 12 August.
Relevant evidence: Yes