Question: Ælfwine Haroldsson, most probably an illegitimate son of King Harold Harefoot of England, and most likely left in his otherwise unknown mother's or grandmother's care, was the first wife of what king?
{'answer': 'King Cnut', 'supporting_facts': [['Ælfwine Haroldsson', 0], ['Ælfwine Haroldsson', 5], ['Ælfgifu of Northampton', 0]]}