What was George W. Gregory's class?
{'header': ['Player', 'Position', 'Games started', 'Hometown', 'Height', 'Weight', 'Class', 'Previous experience'], 'page_title': '1902 Michigan Wolverines football team', 'page_id': '', 'types': ['text', 'text', 'text', 'text', 'text', 'real', 'text', 'text'], 'id': '1-14342367-13', 'section_title': 'Varsity letter winners', 'caption': 'Varsity letter winners', 'rows': [['Charles B. Carter', 'Right guard', '10', 'Auburn, Maine', '6\' 0"', '231', "Law '05", 'Brown Varsity (2 years)'], ['William C. "King" Cole', 'Right end Left tackle', '4 3', 'Chicago, Illinois', '5\' 10½"', '178', "Law '05", 'Marietta College (2 years)'], ['Herbert S. Graver', 'Left end Quarterback Fullback Left halfback', '2 1 1 1', 'Chicago, Illinois', '5\' 8¼"', '162', "Eng '04", 'Varsity (1 year)'], ['George W. Gregory', 'Center', '11', 'Redding, California', '5\' 10-8/10"', '190', "Law '04", 'Varsity (1 year)'], ['Albert E. Herrnstein', 'Right halfback', '11', 'Chillicothe, Ohio', '5\' 10"', '168', "Lit '03", 'Varsity (1 year)'], ['Willie Heston', 'Left halfback', '9', 'Grants Pass, Oregon', '5\' 8"', '180', "Law '04", 'Varsity (1 year)'], ['Paul J. Jones', 'Fullback', '7', 'Youngstown, Ohio', '6\' 0"', '170', "Law '04", 'Reserves (1 year)'], ['James E. Lawrence', 'Fullback Left tackle Right guard', '3 1 1', 'Ypsilanti, Michigan', '6\' 1/2"', '187', "Lit '06", 'Ypsilanti H.S.'], ['Joseph Maddock', 'Right tackle', '11', 'East Jordan, Michigan', '5\' 11"', '187', 'Spec. Lit.', 'Albion (2 years)'], ['Dan McGugin', 'Left guard', '10', 'Tingley, Iowa', '5\' 11"', '184', "Law '04", 'Varsity (1 year)'], ['William S. Palmer', 'Left tackle', '4', 'Chester, Massachusetts', '5\' 8"', '189', "Law '05", 'Chester H.S.'], ['Curtis Redden', 'Left end', '9', 'Rossville, Illinois', '5\' 11"', '180', "Law '03", 'Varsity (2 years)'], ['Everett Sweeley', 'Right end', '7', 'Sioux City, Iowa', '5\' 10"', '172', "Lit '03", 'Varsity (3 years)']], 'name': 'table_14342367_13'}