user: Question: How many themes have the original artist of Judy Garland?
Columns: ['Week #', 'Theme', 'Song choice', 'Original artist', 'Order #', 'Result']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Top 24 (12 Men)', '1960s', '" Daydream "', "The Lovin' Spoonful", '11', 'Safe']
SQL:

assistant: SELECT COUNT("Theme") FROM "Table" WHERE "Original artist" = 'Judy Garland';