Given the question: Information: - Internal security, or IS, is the act of keeping peace within the borders of a sovereign state or other self-governing territories. generally by upholding the national law and defending against internal security threats. Responsibility for internal security may range from police to paramilitary forces, and in exceptional circumstances, the military itself. - Law enforcement is any system by which some members of society act in an organized manner to enforce the law by discovering, deterring, rehabilitating, or punishing people who violate the rules and norms governing that society. Although the term may encompass entities such as courts and prisons, it is most frequently applied to those who directly engage in patrols or surveillance to dissuade and discover criminal activity, and those who investigate crimes and apprehend offenders, a task typically carried out by the police or another law enforcement agency. Furthermore, although law enforcement may be most concerned with the prevention and punishment of crimes, organizations exist to discourage a wide variety of non-criminal violations of rules and norms, effected through the imposition of less severe consequences. - Sabotage is a deliberate action aimed at weakening a polity or corporation through subversion, obstruction, disruption or destruction. In a workplace setting, sabotage is the conscious withdrawal of efficiency generally directed at causing some change in workplace conditions. One who engages in sabotage is a saboteur. Saboteurs typically try to conceal their identities because of the consequences of their actions. - A security agency is a governmental organization which conducts intelligence activities for the internal security of a nation. They are the domestic cousins of foreign intelligence agencies, and typically conduct counterintelligence to thwart other countries' foreign intelligence efforts. For example, the United States Federal Bureau of Investigation (FBI) is the internal intelligence, security and law enforcement agency, while the Central Intelligence Agency (CIA) is an external intelligence service, which deals primarily with intelligence collection overseas. A similar relationship exists in Britain between MI5 and MI6. - The Security Service, also MI5 (Military Intelligence, Section 5), is the United Kingdom's domestic counter-intelligence and security agency and is part of its intelligence machinery alongside the Secret Intelligence Service (MI6), Government Communications Headquarters (GCHQ) and Defence Intelligence (DI). MI5 is directed by the Joint Intelligence Committee (JIC), and the service is bound by the Security Service Act 1989. The service is directed to protect British parliamentary democracy and economic interests, and counter terrorism and espionage within the UK. - A nation (from Latin: "natio", "people, tribe, kin, genus, class, flock") is a large group or collective of people with common characteristics attributed to them including language, traditions, "mores" (customs), "habitus" (habits), and ethnicity. By comparison, a nation is more impersonal, abstract, and overtly political than an ethnic group. It is a cultural-political community that has become conscious of its autonomy, unity, and particular interests. - The Central Intelligence Agency (CIA) is a civilian foreign intelligence service of the United States federal government, tasked with gathering, processing and analyzing national security information from around the world, primarily through the use of human intelligence (HUMINT). As one of the principal members of the U.S. Intelligence Community (IC), the CIA reports to the Director of National Intelligence and is primarily focused on providing intelligence for the President and Cabinet. - The Federal Office for the Protection of the Constitution ( German : Bundesamt fur Verfassungsschutz ( BfV ) ) is the Federal Republic of Germany 's domestic security agency . Together with the Landesamter fur Verfassungsschutz ( LfV ) at the state level , it is tasked with intelligence - gathering on threats concerning the democratic order , the existence and security of the federation or one of its states , and the peaceful coexistence of peoples ; with counter-intelligence ; and with protective security and counter-sabotage . The BfV reports to the Federal Ministry of the Interior . From 2000 to July 2012 , Heinz Fromm ( SPD ) served as its president until his resignation in the wake of a scandal regarding the destruction of files related to the National Socialist Underground , a Neo-Nazi terror group . Since 1 August 2012 , the agency has been headed by Hans - Georg Maaen . - Counterintelligence (CI) refers to information gathered and activities conducted to protect against espionage, other intelligence activities, sabotage, or assassinations conducted for or on behalf of foreign powers, organizations or persons or international terrorist activities, but not including personnel, physical, document or communications security programs. - The Federal Bureau of Investigation, or FBI, is the domestic intelligence and security service of the United States, which simultaneously serves as the nation's prime federal law enforcement agency. Operating under the jurisdiction of the U.S. Department of Justice, the FBI is concurrently a member of the U.S. Intelligence Community and reports to both the Attorney General and the Director of National Intelligence. A leading U.S. counterterrorism, counterintelligence, and criminal investigative organization, the FBI has jurisdiction over violations of more than 200 categories of federal crimes. Given the information, choose the subject and object entities that have the relation of 'field of work'.
The answer is:
federal office for the protection of the constitution , counterintelligence