Question: John Brown, was an American abolitionist who believed and advocated that armed insurrection was the only way to overthrow the institution of slavery in which location, during the Kansas campaign, Brown commanded forces at which battle that took place on June 2, 1856, when anti-slavery forces, led by the noted abolitionist John Brown, attacked the encampment of Henry C. Pate near Baldwin City, Kansas?
{'answer': 'United States', 'supporting_facts': [['John Brown (abolitionist)', 0], ['Battle of Black Jack', 0]]}