ก่อนปี 1976 และมี 12 แต้ม Ford V8 มีแชสซีอะไร?
Before 1976 and with 12 points, what chassis did the Ford V8 have?
df = pd.DataFrame(columns=['chassis', 'points', 'engine', 'year'])
df[(df['engine'] == 'ford v8') & (df['year'] < 1976) & (df['points'] == '12')]['chassis']