Question: Émile Driant was the first high-ranking casualty in the largest  and longest battle of the First World War on the Western Front between the German and French armies, fought when?
{'answer': 'from 21 February to 18 December 1916', 'supporting_facts': [['Émile Driant', 0], ['Émile Driant', 1], ['Battle of Verdun', 0]]}