คะแนนเฉลี่ยคือเท่าไรเมื่อชื่อ Romanji คือ Mendol?
What's the average rating when the Romanji title was Mendol?
df = pd.DataFrame(columns=['average_ratings', 'romaji_title'])
df.loc[df['romaji_title'] == 'mendol']['average_ratings']