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:
| Season | Cup FinalDate | WinningTeam | Score | LosingTeam | Location | Cup Final Attendance |
| --- | --- | --- | --- | --- | --- | --- |
| 1977 | 9 October 1977 | Brisbane City (1) | 1–1 (5-3 Penalties) | Marconi Stallions | Perry Park , Brisbane (1) | 9000.0 |
| 1978 | 8 October 1978 | Brisbane City (2) | 2–1 | Adelaide City | Perry Park , Brisbane (2) | 6964.0 |
| 1979 | 30 September 1979 | Adelaide City (1) | 3–1 | St George | Olympic Sports Field , Adelaide (1) | 9554.0 |
| 1981 | 20 September 1981 | Brisbane Lions (1) | 3–1 | West Adelaide | Canberra Stadium , Canberra (1) | 8132.0 |
| 1982 | 12 September 1982 | APIA Leichhardt (2) | 2–1 | Heidelberg United | Olympic Park , Melbourne (2) | 7000.0 |
| 1984 | 13 September 1984 | Newcastle Rosebud United (1) | 1–0 | Melbourne Knights | Olympic Park , Melbourne (4) | 5000.0 |
| 1985 | 11 August 1985 | Sydney Olympic (2) | 2–1 | Preston Lions | St. George Stadium , Sydney (2) | 11187.0 |
| 1986 | 17 September 1986 | Sydney City (1) | 3–2 (a.e.t.) | West Adelaide | Hindmarsh Stadium , Adelaide (1) | 5200.0 |
| 1988 | 14 August 1988 | APIA Leichhardt (2) | 0–0 (5-3 Penalties) | Brunswick Juventus | Marconi Stadium , Sydney (2) | 5200.0 |
| 1989 | 20 August 1989 | Adelaide City (2) | 2–0 | Sydney Olympic | Hindmarsh Stadium , Adelaide (2) | 10000.0 |
| 1989–90 | 25 April 1990 | South Melbourne (1) | 4–1 | Sydney Olympic | Olympic Park , Melbourne (6) | 7000.0 |
| 1990–91 | 7 April 1991 | Parramatta Eagles (1) | 1–0 | Preston Lions | Marconi Stadium , Sydney (3) | 8749.0 |
| 1991–92 | 7 April 1992 | Adelaide City (3) | 2–1 | Marconi Stallions | Hindmarsh Stadium , Adelaide (3) | 6500.0 |
| 1992–93 | 18 April 1993 | Heidelberg United (1) | 2–0 | Parramatta Eagles | Marconi Stadium , Sydney (4) | 4596.0 |
| 1993–94 | 17 October 1993 | Parramatta Eagles (2) | 2–0 | Sydney United | Marconi Stadium , Sydney (5) | 5156.0 |
| 1994–95 | 16 October 1994 | Melbourne Knights (1) | 6–0 | Heidelberg United | Olympic Park , Melbourne (7) | 6000.0 |
| 1995–96 | 27 January 1996 | South Melbourne (2) | 3–1 | Newcastle Breakers | Lakeside Stadium , Melbourne (1) | 7000.0 |
Question:
How many losingteams were for the cup finaldate 20 August 1989?
Answer:
1.0