user: Question: Name the production code for 4.92 million viewers
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date', 'Prod. code', 'Viewers (millions)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [31.0, 1.0, '"Traffic"', 'Constantine Makris', 'Andrew Lenchewski', 'June29,2011', 'RP#301', '5.00']
SQL:

assistant: SELECT "Prod. code" FROM "Table" WHERE "Viewers (millions)" = '4.92';