ตอนที่ John Mcenroe ชนะ Montreal ได้คะแนนเท่าไหร่?
When John Mcenroe won at Montreal, what was the score?
df = pd.DataFrame(columns=['score', 'location', 'champion'])
df.loc[(df['location'] == 'montreal') & (df['champion'] == 'john mcenroe'), 'score']