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:
| Event | Winner | Second | Third | Fourth |
| --- | --- | --- | --- | --- |
| 2008 Telstra Men's Pro | Josh Constable | Seb Wilson | Grant Thomas | Jackson Close |
| 2008 Banana Boat Women's Pro | Jennifer Smith | Janna Irons | Justin Dupont | Selby Riddle |
| 2007 Odyssey 20/20 Men's Pro | Josh Constable | Harrison Roach | Jackson Close | Harley Ingleby |
| 2007 Banana Boat Women's Pro | Chelsea Wlliams | Lisa Nicholson | Isabelle Braley | Crystal Dzigas |
| 2009 Golden Breed Mens Pro LQS | Taylor Jensen | Josh Constable | Christian Wach | Harrison Roach |
| 2009 Banana Boat Women's Pro | Chelsea Wlliams | Melissa Combo | IsaSelby Riddle | Isabelle Brayley |
| 2010 Golden Breed Mens Pro LQS | Taylor Jensen | Josh Constable | Christian Wach | Jackson Close |
| 2010 The Back Beach Women’s 1 Star Pro | Crystal Dzigas | Isabele Braly | Leah Dawson | Rosie Locke |
Question:
what is the total number of times chelsea williams was the winner between 2007 and 2010?
Answer:
2