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:
| Series | Premiere | Finale | Runners-up | Winner |
| --- | --- | --- | --- | --- |
| 1.0 | 17 August 2010 | 21 September 2010 | Miranda Gore Browne | Edd Kimber |
| 1.0 | 17 August 2010 | 21 September 2010 | Ruth Clemens | Edd Kimber |
| 2.0 | 14 August 2011 | 4 October 2011 | Holly Bell | Joanne Wheatley |
| 2.0 | 14 August 2011 | 4 October 2011 | Mary-Anne Boermans | Joanne Wheatley |
| 3.0 | 14 August 2012 | 16 October 2012 | Brendan Lynch | John Whaite |
| 3.0 | 14 August 2012 | 16 October 2012 | James Morton | John Whaite |
| 4.0 | 20 August 2013 | 22 October 2013 | Kimberley Wilson | Frances Quinn |
Question:
What is the date when Miranda Gore Browne was runner-up?
Answer:
21 September 2010