What is the least amount of extra points made in by a player?
{'header': ['Player', 'Position', 'Starter', 'Touchdowns', 'Extra points', 'Field goals', 'Points'], 'page_title': '1901 Michigan Wolverines football team', 'section_title': 'Michigan 128, Buffalo 0', 'caption': 'Michigan 128, Buffalo 0', 'rows': [['Herrnstein', 'Right end', 'Yes', '5', '0', '0', '25'], ['Shorts', 'Right tackle', 'Yes', '1', '18', '0', '23'], ['Snow', 'Fullback', 'Yes', '4', '0', '0', '20'], ['Redner', 'Left halfback', 'No', '4', '0', '0', '20'], ['Heston', 'Left halfback', 'Yes', '3', '0', '0', '15'], ['Redden', 'Left end', 'Yes', '2', '0', '0', '10'], ['Sweeley', 'Right halfback', 'Yes', '3', '0', '0', '15']]}