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:
| Name | Country | Type | Moving from | Transfer window | Ends | Transfer fee | Source |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Ankergren | DEN | Transfer | Brøndby | Summer | 2010.0 | Undisclosed | Leeds United |
| Constantine | ENG | Free Agent | Port Vale | Summer | 2009.0 | Free | Leeds United |
| Weston | ENG | Free Agent | Swindon Town | Summer | 2009.0 | Free | Leeds United |
| Prutton | ENG | Free Agent | Southampton | Summer | 2009.0 | Free | Leeds United |
| Thompson | ENG | Free Agent | Celtic | Summer | 2008.0 | Free | Leeds United |
| Hughes | ENG | Transfer | Norwich City | Summer | 2009.0 | Undisclosed | Leeds United |
| Martin | SCO | Transfer | Motherwell | Summer | 2009.0 | Undisclosed | Leeds United |
| Huntington | ENG | Transfer | Newcastle United | Summer | 2009.0 | £150k | Leeds United |
| da Costa | POR | Free Agent | Ionikos | Summer | 2008.0 | Free | Leeds United |
| Lucas | ENG | Free Agent | Barnsley | Summer | 2008.0 | Free | Leeds United |
| Sorsa | FIN | Free Agent | HJK | Winter | 2009.0 | Free | Leeds United |
| Kilkenny | AUS ENG | Transfer | Birmingham City | Winter | 2011.0 | £150k | Leeds United |
| Johnson | ENG | Transfer | Northampton Town | Winter | 2011.0 | £250k | Leeds United |
| Sweeney | SCO | Transfer | Stoke City | Winter | 2010.0 | £150k | Leeds United |
| Kenton | ENG | Free Agent | Leicester City | Winter | 2008.0 | Free | Leeds United |
| Michalík | SVK | Transfer | Bolton Wanderers | Winter | 2011.0 | £200k | Leeds United |
| Elding | ENG | Transfer | Stockport County | Winter | 2010.0 | £100k | Leeds United Yorkshire Post |
Question:
What is the transfer fee of the move from Port Vale?
Answer:
Free