Head to Head March-Alfa Romeo driver comparison for 1971 season.
[{'label': 'Andrea de Adamich', 'data': [13, 20, 23, 24, 25, None, 29, 30]}, {'label': 'Ronnie Peterson', 'data': [None, None, 5, None, None, None, None, None]}, {'label': 'Nanni Galli', 'data': [None, None, None, None, 23, 24, None, None]}]