Question: What kinds of operations did John W. "Jack" Eskridge perform when he joined the United States Marine Corps?
{'answer': 'The United States Marine Corps (USMC), also known as the United States Marines, is a branch of the United States Armed Forces responsible for conducting amphibious operations with the United States Navy.', 'supporting_facts': [['Jack Eskridge', 5], ['United States Marine Corps', 0]]}