เกมนี้เล่นบนพื้นแข็งที่ Tournament of Sweden f2 วันที่เท่าไหร่?
What date was the game played on the hard surface at the Tournament of Sweden f2?
df = pd.DataFrame(columns=['date', 'surface', 'tournament'])
df[(df['surface'] == 'hard') & (df['tournament'] == 'Sweden f2')]['date']