Head to Head Williams driver comparison for 1999 season.
[{'label': 'Ralf Schumacher', 'data': [3, 4, 5, 5, 6, 7, 5, 6, 6, 6, 6, 6, 6, 5, 6, 6]}, {'label': 'Alessandro Zanardi', 'data': [None, None, 19, 17, 17, 21, 21, 21, 21, 21, 21, 19, 18, 19, 19, 19]}]