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 | Opponent | Result | Game site | Record | Attendance |
| --- | --- | --- | --- | --- | --- | --- |
| 1.0 | September 17 | Houston Oilers | W 30–17 | Mile High Stadium | 1–0 | 51656.0 |
| 2.0 | September 24 | at San Diego Chargers | L 14–37 | San Diego Stadium | 1–1 | 49048.0 |
| 3.0 | October 1 | Kansas City Chiefs | L 24–45 | Mile High Stadium | 1–2 | 51656.0 |
| 4.0 | October 8 | at Cincinnati Bengals | L 10–21 | Riverfront Stadium | 1–3 | 55812.0 |
| 5.0 | October 15 | Minnesota Vikings | L 20–23 | Mile High Stadium | 1–4 | 51656.0 |
| 6.0 | October 22 | at Oakland Raiders | W 30–23 | Oakland-Alameda County Coliseum | 2–4 | 53551.0 |
| 7.0 | October 29 | Cleveland Browns | L 20–27 | Mile High Stadium | 2–5 | 51656.0 |
| 8.0 | November 5 | at New York Giants | L 17–29 | Yankee Stadium | 2–6 | 62689.0 |
| 9.0 | November 12 | at Los Angeles Rams | W 16–10 | Los Angeles Memorial Coliseum | 3–6 | 65398.0 |
| 10.0 | November 19 | Oakland Raiders | L 20–37 | Mile High Stadium | 3–7 | 51656.0 |
| 11.0 | November 26 | at Atlanta Falcons | L 20–23 | Atlanta-Fulton County Stadium | 3–8 | 58850.0 |
| 12.0 | December 3 | at Kansas City Chiefs | L 21–24 | Arrowhead Stadium | 3–9 | 66725.0 |
| 13.0 | December 10 | San Diego Chargers | W 38–13 | Mile High Stadium | 4–9 | 51478.0 |
| 14.0 | December 17 | New England Patriots | W 45–21 | Mile High Stadium | 5–9 | 51656.0 |
Question:
What was their record when they played at Riverfront Stadium?
Answer:
1–3