นิทรรศการนี้มีธีมและชื่อศิลปินอะไรซึ่งมีราคาตั๋วสูงกว่าค่าเฉลี่ย?
What is the theme and artist name for the exhibition with a ticket price higher than the average?
df_exhibition = pd.DataFrame(columns=['theme', 'artist_id', 'ticket_price']); df_artist = pd.DataFrame(columns=['name', 'artist_id'])
df_exhibition[df_exhibition['ticket_price'] > df_exhibition['ticket_price'].mean()].merge(df_artist, on='artist_id')[['theme', 'name']]