Question: Which battle was fought for a shorter period of time, the Battle of the Ch'ongch'on River, or the Meuse-Argonne Offensive?
{'answer': "Battle of the Ch'ongch'on River", 'supporting_facts': [['Meuse-Argonne Offensive', 0], ['Meuse-Argonne Offensive', 1], ["Battle of the Ch'ongch'on River", 0]]}