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 | Sunday, April 4 | 4:00 p.m. | at Rhein Fire | L 25–26 | 0–1 | Arena AufSchalke | 22736.0 |
| 2.0 | Saturday, April 10 | 7:00 p.m. | Frankfurt Galaxy | L 10–20 | 0–2 | RheinEnergieStadion | 9134.0 |
| 3.0 | Sunday, April 18 | 4:00 p.m. | at Berlin Thunder | L 31–35 | 0–3 | Olympic Stadium | 12036.0 |
| 4.0 | Saturday, April 24 | 7:00 p.m. | Scottish Claymores | W 17–3 | 1–3 | RheinEnergieStadion | 8761.0 |
| 5.0 | Saturday, May 1 | 7:00 p.m. | at Frankfurt Galaxy | L 17–24 | 1–4 | Waldstadion | 24117.0 |
| 6.0 | Saturday, May 8 | 7:00 p.m. | Berlin Thunder | W 28–27 | 2–4 | RheinEnergieStadion | 10164.0 |
| 7.0 | Saturday, May 15 | 7:00 p.m. | at Amsterdam Admirals | L 10–17 | 2–5 | Amsterdam ArenA | 14437.0 |
| 8.0 | Sunday, May 23 | 4:00 p.m. | Rhein Fire | W 7–6 | 3–5 | RheinEnergieStadion | 20354.0 |
| 9.0 | Sunday, May 30 | 4:00 p.m. | Amsterdam Admirals | L 18–23 | 3–6 | RheinEnergieStadion | 9056.0 |
Question:
How many different kickoffs happened when the oppenent was at Rhein Fire?
Answer:
1.0