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 | Venue | Opponents | Score | Comp | Attendance |
| --- | --- | --- | --- | --- | --- |
| 2005-04-11 | Stadion | Häcken | 2-1 | Allsvenskan | 12 823 |
| 2005-04-19 | Örjans Vall | Halmstad | 1-3 | Allsvenskan | 7 038 |
| 2005-04-25 | Stadion | ÖIS | 2-2 | Allsvenskan | 10 507 |
| 2005-05-02 | Borås Arena | Elfsborg | 2-1 | Allsvenskan | 8 933 |
| 2005-05-09 | Stadion | Gefle | 3-1 | Allsvenskan | 10 310 |
| 2005-05-18 | Söderstadion | Hammarby | 1-2 | Allsvenskan | 15 322 |
| 2005-05-23 | Stadion | Assyriska | 3-1 | Allsvenskan | 12 114 |
| 2005-05-29 | Fredriksskans | Kalmar | 2-0 | Allsvenskan | 7 185 |
| 2005-06-13 | Råsunda | Göteborg | 0-0 | Allsvenskan | 16 771 |
| 2005-06-16 | Malmö Stadion | Malmö | 3-1 | Allsvenskan | 20 135 |
| 2005-06-20 | Råsunda | Helsingborg | 5-2 | Allsvenskan | 13 907 |
| 2005-06-27 | Landskrona IP | Landskrona | 2-0 | Allsvenskan | 5 257 |
| 2005-07-11 | Idrottsparken | Sundsvall | 1-1 | Allsvenskan | 7 741 |
| 2005-07-18 | Stadion | Sundsvall | 4-0 | Allsvenskan | 12 878 |
| 2005-07-27 | Stadion | Landskrona | 0-1 | Allsvenskan | 12 340 |
| 2005-08-01 | Olympia | Helsingborg | 0-2 | Allsvenskan | 16 000 |
| 2005-08-04 | Råsunda | Hammarby | 2-2 | Allsvenskan | 27 108 |
| 2005-08-14 | Strömvallen | Gefle | 3-1 | Allsvenskan | 7 198 |
| 2005-08-21 | Stadion | Kalmar | 3-1 | Allsvenskan | 12 912 |
| 2005-08-28 | Stadion | Assyriska | 2-0 | Allsvenskan | 5 755 |
| 2005-09-12 | Stadion | Malmö | 2-0 | Allsvenskan | 14 181 |
| 2005-09-19 | Ullevi | Göteborg | 3-1 | Allsvenskan | 25 438 |
| 2005-09-25 | Rambergsvallen | Häcken | 0-1 | Allsvenskan | 3 177 |
| 2005-10-03 | Stadion | Halmstad | 6-1 | Allsvenskan | 13 022 |
| 2005-10-17 | Gamla Ullevi | ÖIS | 0-0 | Allsvenskan | 9 293 |
| 2005-10-23 | Stadion | Elfsborg | 8-1 | Allsvenskan | 14 102 |
Question:
Who was the opponent at Ullevi?
Answer:
Göteborg