คลาสไหนอยู่บน Las Vegas Motor Speedway เป็นเวลา 2 ชั่วโมง?
Which class was on the Las Vegas Motor Speedway for 2 hours?
df = pd.DataFrame(columns=['class', 'length', 'circuit'])
df[(df['length'] == '2 hours') & (df['circuit'] == 'las vegas motor speedway')]['class']