user: Question: Who are the writers of the episode with production code IP02009?
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: [10.0, 3.0, '" Dennis and Dee Go on Welfare "', 'Dan Attias', 'Rob McElhenney', 'July6,2006', 'IP02004']
SQL:

assistant: SELECT "Written by" FROM "Table" WHERE "Production code" = 'IP02009';