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:
| Year | Competition | Venue | Position | Event | Notes |
| --- | --- | --- | --- | --- | --- |
| 1998 | Turin Marathon | Turin, Italy | 3rd | Marathon | 2:12:59 |
| 2003 | Lisbon Marathon | Lisbon, Portugal | 1st | Marathon | 2:15:31 |
| 2004 | Vienna Marathon | Vienna, Austria | 3rd | Marathon | 2:11:24 |
| 2004 | Berlin Marathon | Berlin, Germany | 5th | Marathon | 2:09:08 |
| 2005 | World Championships | Helsinki, Finland | 18th | Marathon | 2:16:33 |
| 2006 | Paris Marathon | Paris, France | 4th | Marathon | 2:08:55 |
| 2006 | Lisbon Marathon | Lisbon, Portugal | 1st | Marathon | 2:21:08 |
| 2007 | World Championships | Osaka, Japan | — | Marathon | DNS |
Question:
how many years after the turin marathon did the berlin marathon occur?
Answer:
6