Question: Gerda Munsinger was dubbed "The Mata Hari of the Cold War", in reference to Margaretha Geertruida "Margreet" MacLeod who was convicted of being a spy for what country in World War I?

Context paragraphs:
Mata Hari (1985 film): Mata Hari is a 1985 film directed by Curtis Harrington produced by Golan-Globus featuring Sylvia Kristel in the title role of exotic dancer Mata Hari, executed for espionage during World War I.

Mata Hari (1927 film): Mata Hari, die rote Tänzerin (English: Mata Hari: The Red Dancer), often shortened on release to Mata Hari, is a 1927 German silent drama film directed by Friedrich Feher and starring Magda Sonja, Wolfgang Zilzer and Fritz Kortner.  It depicts the life and death of the German World War I spy Mata Hari.  It was the first feature-length portrayal of Hari.

Mata Hari (Wildhorn musical): Mata Hari at the Moulin Rouge is a musical with a book by Ivan Menchell, lyrics by Jack Murphy, and music by Frank Wildhorn.  It is based on the life of Mata Hari, a dancer and spy during World War I.

Mata Hari, Agent H21: Mata Hari, Agent H21 (Italian:Mata-Hari, agente segreto H21) is a 1964 French-Italian spy film directed by Jean-Louis Richard and starring Jeanne Moreau, Jean-Louis Trintignant and Claude Rich.  It portrays the activities of the First World War spy Mata Hari.

I'm Not Mata Hari: I'm Not Mata Hari (Spanish:Yo no soy la Mata-Hari) is a 1949 Spanish comedy spy film directed by Benito Perojo and starring Niní Marshall, Roberto Font and Virgilio Teixeira.  The film's sets were designed by the art director Sigfrido Burmann.  The film's title refers to Mata Hari, the First World War-era spy.

Mata Hari: Margaretha Geertruida "Margreet" MacLeod ("née" Zelle; 7 August 187615 October 1917), better known by the stage name Mata Hari, was a Dutch exotic dancer and courtesan who was convicted of being a spy for Germany during World War I and executed by firing squad in France.

Operation Mata Hari: Operation Mata Hari (Spanish: Operación Mata Hari) is a 1968 Spanish comedy film directed by  Mariano Ozores and starring Gracita Morales, José Luis López Vázquez and Antonio Ozores.  It is based on the story of the German spy Mata Hari's activities during the First World War.

Mata Hari (musical): Mata Hari is a musical with a book by Jerome Coopersmith, lyrics by Martin Charnin and music by Edward Thomas.  The exotic dancer Mata Hari was accused of spying for the Germans during World War I and was executed by a French firing squad, but her guilt is still being debated.  The musical is centered on her affair with a French intelligence officer who plays a major role in her arrest and execution and later regrets it.  A parallel sequence of events follows a young French soldier who fights in the trenches, illustrating what war is really about.  The musical was perceived as an anti-war piece at a time when the US war in Vietnam was sinking in popularity.

Gerda Munsinger: Gerda Munsinger (born Gerda Hesler or Heseler or Hessler, also known as Olga Schmidt and Gerda Merkt; September 10, 1929 – November 24, 1998) was an East German prostitute and alleged Soviet spy (although these allegations were ultimately unproven).  She immigrated to Canada in 1955.  Munsinger was the central protagonist of the Munsinger Affair, the first national political sex scandal in Canada, and was dubbed "the Mata Hari of the Cold War" because of her involvement with several Canadian politicians.  She returned to Germany in 1961, became the centre of press attention in 1966 when the scandal was publicly revealed, and was the subject of a feature film.

Munsinger Affair: The Munsinger Affair was Canada's first national political sex scandal.  It focused on Gerda Munsinger, an alleged East German prostitute and Soviet spy living in Ottawa who had slept with a number of cabinet ministers in John Diefenbaker's government.

Supporting paragraphs: Gerda Munsinger Mata Hari
Answer: Germany