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:
| Week | Date | Kickoff | Opponent | Final score | Team record | Game site | Attendance |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1.0 | Saturday, April 21 | 3:00 p.m. | at Scottish Claymores | L 21–24 | 0–1 | Hampden Park | 16387.0 |
| 2.0 | Saturday, April 28 | 7:00 p.m. | Berlin Thunder | L 20–28 | 0–2 | Waldstadion | 27928.0 |
| 3.0 | Saturday, May 5 | 7:00 p.m. | at Amsterdam Admirals | L 14–28 | 0–3 | Amsterdam ArenA | 14268.0 |
| 4.0 | Saturday, May 12 | 7:00 p.m. | Scottish Claymores | W 27–17 | 1–3 | Waldstadion | 33437.0 |
| 5.0 | Saturday, May 19 | 6:00 p.m. | at Berlin Thunder | L 25–34 | 1–4 | Jahn-Sportpark | 9559.0 |
| 6.0 | Sunday, May 27 | 7:00 p.m. | Rhein Fire | L 5–22 | 1–5 | Waldstadion | 30512.0 |
| 7.0 | Saturday, June 2 | 5:00 p.m. | at Barcelona Dragons | L 20–31 | 1–6 | Estadi Olímpic de Montjuïc | 9851.0 |
| 8.0 | Saturday, June 9 | 7:00 p.m. | Amsterdam Admirals | W 28–23 | 2–6 | Waldstadion | 29587.0 |
| 9.0 | Saturday, June 16 | 7:00 p.m. | at Rhein Fire | L 13–17 | 2–7 | Rheinstadion | 51719.0 |
Question:
what was the opposition where the field is waldstadion during time 6
Answer:
Rhein Fire