Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Episode | Director | Writer | Original air date | Ratings (millions) |
| --- | --- | --- | --- | --- |
| "Episode 1" | Paul Gay | Peter Bowker | 21July2009 | 2.61 |
| "Episode 2" | Paul Gay | Peter Bowker | 28July2009 | 2.13 |
| "Episode 3" | Paul Gay | Peter Bowker | 4August2009 | 2.15 |
| "Episode 4" | Diarmuid Lawrence | Peter Bowker | 11August2009 | 1.92 |
| "Episode 5" | Diarmuid Lawrence | Peter Bowker | 18August2009 | 1.96 |
Question:
What is the original air date if the ratings is 1.92 million?
Answer:
11August2009