Which conference has the nickname Chargers?
{'header': ['Institution', 'Location', 'Founded', 'Type', 'Enrollment', 'Nickname', 'Joined', 'Left', 'Current Conference'], 'page_title': 'The Commonwealth Coast Conference', 'page_id': '', 'types': ['text', 'text', 'real', 'text', 'real', 'text', 'real', 'real', 'text'], 'id': '1-1973729-2', 'section_title': 'Former members', 'caption': 'Former members', 'rows': [['Anna Maria College', 'Paxton, Massachusetts', '1946', 'Private', '1432', 'AMCats', '1984', '2011', 'Great Northeast (GNAC)'], ['Colby–Sawyer College', 'New London, New Hampshire', '1837', 'Private', '1200', 'Chargers', '1994', '2011', 'North Atlantic (NAC)'], ['Emerson College', 'Boston, Massachusetts', '1880', 'Private', '4290', 'Lions', '1984', '1989', 'NEWMAC'], ['Hellenic College', 'Brookline, Massachusetts', '1937', 'Private', '222', 'Owls', '1984', '1985', 'Dropped athletics'], ['New England College', 'Henniker, New Hampshire', '1946', 'Private', '1460', 'Pilgrims', '1989', '2011', 'North Atlantic (NAC)'], ['Regis College †', 'Weston, Massachusetts', '1927', 'Private', '1737', 'Pride', '1988', '2011', 'NECC']], 'name': 'table_1973729_2'}