user: Question: How many directed have the product code of 2.8?
Columns: ['#', 'Original title', 'Directed by', 'Written by', 'Original airdate', 'Prod. code']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['2–1', '"Back & Bad"', 'Delyth Thomas', 'Mary Morris', '10July2003', '2.1']
SQL:

assistant: SELECT COUNT("Directed by") FROM "Table" WHERE "Prod. code" = '2.8';