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 2 | 7:00 p.m. | at Amsterdam Admirals | L 14–24 | 0–1 | Amsterdam ArenA | 10234.0 |
| 2.0 | Sunday, April 10 | 4:00 p.m. | Cologne Centurions | L 10–23 | 0–2 | LTU arena | 25304.0 |
| 3.0 | Saturday, April 16 | 7:00 p.m. | at Hamburg Sea Devils | L 24–31 | 0–3 | AOL Arena | 19865.0 |
| 4.0 | Saturday, April 23 | 7:00 p.m. | Berlin Thunder | L 28–30 | 0–4 | LTU arena | 20399.0 |
| 5.0 | Saturday, April 30 | 7:00 p.m. | at Frankfurt Galaxy | L 20–23 | 0–5 | Commerzbank-Arena | 27439.0 |
| 6.0 | Saturday, May 7 | 7:00 p.m. | Hamburg Sea Devils | W 24–19 | 1–5 | LTU arena | 18632.0 |
| 7.0 | Saturday, May 14 | 6:00 p.m. | at Berlin Thunder | L 15–24 | 1–6 | Olympic Stadium | 16695.0 |
| 8.0 | Saturday, May 21 | 7:00 p.m. | Frankfurt Galaxy | L 13–20 | 1–7 | LTU arena | 28124.0 |
| 9.0 | Sunday, May 29 | 4:00 p.m. | at Cologne Centurions | W 28–16 | 2–7 | RheinEnergieStadion | 32521.0 |
Question:
On week 7, what were the opponents?
Answer:
at Berlin Thunder