Question: Anetta Kahane is a former agent for the official state security service of the German Democratic Republic which was headquartered where?

Context paragraphs:
Ministry of State Security (Transnistria): The Ministry of State Security (Moldovan: Министерул секуритэций статулуй, "Ministerul securităţii statului" Russian: Министерство государственной безопасности , Ukrainian: Міністерство державної безпеки ) is the Transnistrian state security service.  It was formed on 16 May 1992, and was headed by Vladimir Antyufeyev, until he was replaced by Vladislav Finagin in 2012.  The ministry is headquartered in Tiraspol.  Until 11 January 2017 it was known as the Committee of State Security of the PMR.

Counterintelligence state: Counterintelligence state (sometimes also called intelligence state, securocracy or spookocracy) is a state where state security service penetrates and permeates all societal institutions including the military.  The term has been applied by historians and political commentators to the former Soviet Union, the former German Democratic Republic, Cuba after the 1959 revolution, Iraq under Saddam Hussein, and post-Soviet Russia under Vladimir Putin.

Stasi Records Agency: The Federal Commissioner for the Records of the State Security Service of the former German Democratic Republic, also known as the Stasi Records Agency or BStU, (see §Name below) is an upper-level federal agency of Germany that preserves and protects the archives and investigates the past actions of the former Stasi, which served as the secret police and foreign intelligence organization of the communist German Democratic Republic (East Germany).  Since March 2011, Roland Jahn has been head of the agency.

Kayode Are: Lateef Kayode Are is a retired Nigerian Army Colonel who was Director General of the Nigerian State Security Service (SSS) from 1999 to 2007 and briefly served as National Security Adviser in 2010.  Are served as an officer in the Directorate of Military Intelligence up until retirement by General Sani Abacha.  Are was appointed as Director-General of the State Security Service by President Olusegun Obasanjo, served in that post throughout President Obasanjo's two terms (1999-2007), and was replaced Afakiriya Gadzama, who was appointed in August 2007 by President Umaru Yar'Adua.

Main Directorate for Reconnaissance: The Main Directorate for Reconnaissance (German: ' , or HVA) was the foreign intelligence service of the former German Democratic Republic (GDR, "East Germany") and was an integral part of the GDR Ministry of State Security, commonly known as the Stasi.  After the Stasi was disbanded in 1990, its mode of operation was revealed to the public and the HVA was subjected to broad interest, as well as intensive research, which falls under the responsibilities of the Federal Commissioner for the Stasi Records.  The end of the HVA and the discovery of its internal structure, its methods and its employees was an exceptional event, which to date is unique in modern history, after World War II.  The HVA is regarded as the most effective foreign intelligence service during the Cold War.

Anetta Kahane: Anetta Kahane (born 1954) is a German journalist, former Stasi agent, activist and the founder of the Amadeu Antonio Foundation.

William Borm: William Borm (7 July 1895 – 2 September 1987) was a German politician, of the Free Democratic Party (FDP).  He was a member of the Bundestag from 1965 to 1972, and a member of the FDP National Executive Committee from 1960 to 1982.  Several years after his death, it was revealed that since the late 1950s he had been was an agent of the Stasi, the State Security Service of the German Democratic Republic.

Stasi: The Ministry for State Security (German: "Ministerium für Staatssicherheit" , MfS) or State Security Service ("Staatssicherheitsdienst", SSD), commonly known as the Stasi (] ), was the official state security service of the German Democratic Republic (East Germany).  It has been described as one of the most effective and repressive intelligence and secret police agencies to have ever existed.  The Stasi was headquartered in East Berlin, with an extensive complex in Berlin-Lichtenberg and several smaller facilities throughout the city.  The Stasi motto was ""Schild und Schwert der Partei"" (Shield and Sword of the Party), referring to the ruling Socialist Unity Party of Germany (German: "Sozialistische Einheitspartei Deutschlands", SED).  Erich Mielke was its longest-serving chief, in power for thirty-two of the GDR's forty years of existence.

Amadeu Antonio Foundation: The Amadeu Antonio Foundation, established in 1998, is a German foundation engaging against right-wing parties, racism and anti-Semitism.  The foundation’s primary aim is to nurture and encourage civil society in opposition to far-right culture throughout the country, following its motto “encouraging, consulting, funding”.  It was founded by , with Anetta Kahane appointed as its chairwoman and Wolfgang Thierse, the former president of the Bundestag, named as its patron.

State Security Service (Belgium): The State Security Service (VSSE) (known in Dutch as Veiligheid van de Staat (Staatsveiligheid is a false term); French: Sûreté de l'État) is a Belgian intelligence and security agency.  Established in 1830, it is the oldest intelligence service except for the Vatican's.  The State Security is a civilian agency under the authority of the Ministry of Justice, while the other federal intelligence agency, the General Information and Security Service, operates under the authority of the Ministry of Defense.  The current Administrator-General is Jaak Raes, after his predecessor Alain Winants occupied the position for about two years ad-interim.  Before him, Administrator-General Koen Dassen resigned amidst the controversy over State Security losing sight of suspected Kurdish militant Fehriye Erdal.

Supporting paragraphs: Anetta Kahane Stasi
Answer: East Berlin