user: Question: who are the writers of the episode whose production code is 176206? 
Columns: ['No.', '#', 'Title', 'Directed by', 'Written by', 'U.S. air date', 'Production code', 'U.S. viewers (million)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: [45.0, 1.0, '" Exile"', 'Greg Beeman', 'Alfred Gough & Miles Millar', 'October1,2003', 176201.0, '6.80']
SQL:

assistant: SELECT "Written by" FROM "Table" WHERE "Production code" = 176206.0;