user: ### NOW ANSWER:
Question: What is the theme where the original artist is AC/DC?
Columns: ['Episode', 'Theme', 'Song choice', 'Original artist', 'Order #', 'Result']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Audition', "Auditioner's Choice", '"Uomini semplici"', 'Eduardo De Crescenzo', 'N/A', 'Advanced']
SQL:

assistant: SELECT "Theme" FROM "Table" WHERE "Original artist" = 'AC/DC';