Date ใดที่มี Winning Constructor ของ fiat และ Winning driver ของ louis wagner?
Which Date has a Winning constructor of fiat and a Winning driver of louis wagner?
df = pd.DataFrame(columns=['date', 'winning_constructor', 'winning_driver'])
df[(df['winning_constructor'] == 'fiat') & (df['winning_driver'] == 'louis wagner')]['date']