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:
| Date | Tournament | Surface | Opponent in final | Score | Prize Money |
| --- | --- | --- | --- | --- | --- |
| May 21, 2006 | Antalya | Hard | Çağla Büyükakçay | 6-3 6-2 | $10,000 |
| September 24, 2006 | Mytiline | Hard | Alexandra Panova | 6-4 6-4 | $10,000 |
| October 8, 2006 | Volos | Carpet | Patricia Mayr | 6-3 2-6 6-1 | $10,000 |
| March 10, 2007 | Ramat HaSharon | Hard | Nikola Vajdova | 6-2 4-6 6-4 | $10,000 |
| July 8, 2007 | Mont-de-Marsan | Clay | Olivia Sanchez | 6-3 2-6 6-4 | $25,000 |
| July 26, 2008 | A Coruña | Hard | Neuza Silva | 6-2 6-7(5) 6-3 | $25,000 |
| July 5, 2009 | Mont-de-Marsan | Clay | Selima Sfar | 7-5 6-3 | $25,000 |
Question:
What is the surface for the Volos tournament?
Answer:
Carpet