Triple

Target entity: United States Ambassador to the Soviet Union
Context triple: [W. Averell Harriman, positionHeld, United States Ambassador to the Soviet Union]

• A. United States Ambassador to the Soviet Union chosen
  The United States Ambassador to the Soviet Union was the chief American diplomatic representative in Moscow, responsible for managing U.S.–Soviet relations during the existence of the USSR.
• B. United States Minister to Russia
  The United States Minister to Russia was a 19th-century diplomatic post representing American interests and conducting official relations with the Russian Empire.
• C. United States Ambassador
  The United States Ambassador is the chief diplomatic representative of the U.S. government to a foreign country or international organization, responsible for managing bilateral relations and representing American interests abroad.
• D. Minister of Foreign Affairs of the USSR
  The Minister of Foreign Affairs of the USSR was the top Soviet government official responsible for directing the country's foreign policy and representing the Soviet Union in international relations.
• E. Permanent Representative of the Soviet Union to the United Nations
  The Permanent Representative of the Soviet Union to the United Nations was the chief Soviet diplomat and head of the USSR’s mission to the UN, responsible for representing Soviet interests and policies in the organization’s deliberations.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.