user: Question: What's the total number of directors whose episodes have been seen by 9.14 million viewers?
Columns: ['#', 'Episode', 'Writer', 'Director', 'Viewers(millions)', 'Original airdate']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [7.0, 'Episode 1', 'Mike Bullen', 'Tom Hooper', '8.08', '26September1999']
SQL:

assistant: SELECT COUNT("Director") FROM "Table" WHERE "Viewers(millions)" = '9.14';