คู่ไหนเต้นตลกแล้วได้คะแนน 21 (6, 7, 8)
Which couple danced a jive and received a score of 21 (6, 7, 8)?
df = pd.DataFrame(columns=['couple', 'dance', 'score'])
df[df['dance'] == 'jive'][df['score'] == '21 (6, 7, 8)']['couple']