ใครคือผู้ชนะเกมนี้ในปี 1999 โดยมี Kansas City Chiefs เป็นผู้แพ้?
Who was the winner of the game in 1999 with Kansas City Chiefs as the loser?
df = pd.DataFrame(columns=['winner', 'year', 'loser'])
df[(df['year'] == '1999') & (df['loser'] == 'kansas city chiefs')]['winner']