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:
| Player | Nationality | Position | Years for Jazz | School/Club Team |
| --- | --- | --- | --- | --- |
| Mehmet Okur | Turkey | Forward-Center | 2004-11 | Efes Pilsen ( Turkey ) |
| José Ortiz | Puerto Rico | Center | 1988-90 | Oregon State |
| Greg Ostertag | United States | Center | 1995-2004; 2005-06 | Kansas |
| Dan O'Sullivan | United States | Center | 1990-91 | Fordham |
| Andre Owens | United States | Guard | 2005-06 | Houston |
Question:
Who is the center position of Years for Jazz, Greg Ostertag?
Answer:
1995-2004; 2005-06