อัลบั้ม "Balls to the Wall" เป็นของศิลปินคนใด
Which artist does the album "Balls to the Wall" belong to?
df_album = pd.DataFrame(columns=['ArtistId', 'Title']); df_artist = pd.DataFrame(columns=['Name', 'ArtistId'])
df_artist[df_artist['ArtistId'] == df_album[df_album['Title'] == 'Balls to the Wall']['ArtistId'].values[0]]['Name'].values[0]