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:
| DVD name | Ep No. | DVD No. | Release date | Additional information |
| --- | --- | --- | --- | --- |
| Volume 2 | 13.0 | 1.0 | 2009.0 | Includes the entire second Season. |
| Volume 3 | 12.0 | 1.0 | 2009.0 | Includes episodes 1–12 of Season 3. |
| Volume 4 | 12.0 | 1.0 | 2009.0 | Includes episodes 13–24 of Season 3. |
| Volume 5 | 12.0 | 1.0 | 2009.0 | Includes episodes 25–37 of Season 3. |
| Volume 7 | 13.0 | 1.0 | 2009.0 | Includes episodes 2–14 of Season 4. |
Question:
How many release dates does volume 4 DVD have?
Answer:
1.0