user: Question: What is the original air date if the ratings is 1.92 million?
Columns: ['Episode', 'Director', 'Writer', 'Original air date', 'Ratings (millions)']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['"Episode 1"', 'Paul Gay', 'Peter Bowker', '21July2009', '2.61']
SQL:

assistant: SELECT "Original air date" FROM "Table" WHERE "Ratings (millions)" = '1.92';