ผู้เล่นคนไหนชนะในปี 1987 และจบลงด้วยคะแนน +9?
Which player won in 1987 and ended with a score of +9?
df = pd.DataFrame(columns=['total', 'to_par', 'year_s__won'])
df[(df['to_par'] == '+9') & (df['year_s__won'] == '1987')]['total']