user: Question: Who directed the episode with production code 227451?
Columns: ['No.', '#', 'Title', 'Director', 'Writer(s)', 'Original air date', 'Prod. code', 'U.S. viewers (million)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: [22.0, 1.0, '"Sadie, Sadie"', 'Amy Sherman-Palladino', 'Amy Sherman-Palladino', 'October9,2001', 227451.0, '5.0']
SQL:

assistant: SELECT "Director" FROM "Table" WHERE "Prod. code" = 227451.0;