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:
| Volume | Discs | Episodes | Region 1 release | Region 2 release | Region 4 release |
| --- | --- | --- | --- | --- | --- |
| 1 | 1.0 | 5.0 | October 30, 2007 | Not released | June 1, 2010 |
| 2 | 1.0 | 5.0 | January 22, 2008 | Not released | September 23, 2010 |
| 3 | 1.0 | 5.0 | May 6, 2008 | Not released | October 7, 2010 |
| 4 | 1.0 | 6.0 | July 29, 2008 | Not released | November 4, 2010 |
| Box set | 5.0 | 21.0 | September 16, 2008 | February 1, 2010 | December 2, 2010 |
Question:
What discs has a region 1 release date of January 22, 2008?
Answer:
1.0