user: Question: Name the air date for ratings of 2.19 Million
Columns: ['Episode #', 'Title', 'Directed by', 'Written by', 'Originalairdate', 'Ratings']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, '"On Your Knees Forget The Fees"', 'Peter Cattaneo', 'James Wood', '28 June 2010', '2.19 Million']
SQL:

assistant: SELECT "Originalairdate" FROM "Table" WHERE "Ratings" = '2.19 Million';