user: Question: How many different genres appear for The Jimi Hendrix Experience?
Columns: ['Song title', 'Artist', 'Year Year of songs original release, as listed in Rock Band 3', 'Genre', 'Keyboard support', 'Vocal parts', 'Nintendo DS setlist']
Types: ['text', 'text', 'real', 'text', 'text', 'real', 'text']
Sample row: ['" 20th Century Boy "', 'T. Rex', 1973.0, 'Glam Rock', 'Yes', 3.0, 'No']
SQL:

assistant: SELECT COUNT("Genre") FROM "Table" WHERE "Artist" = 'The Jimi Hendrix Experience';