Question: When did the former wife of Graf von Bismarck-Schönhausen donate a piece to the Smithsonian she purchased on her honeymoon with a different man?
{'answer': '1967', 'supporting_facts': [['Bismarck Sapphire Necklace', 2], ['Bismarck Sapphire Necklace', 3], ['Mona von Bismarck', 0], ['Mona von Bismarck', 1]]}