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:
| Opposing Team | Against | Date | Venue | Status |
| --- | --- | --- | --- | --- |
| Córdoba | 21.0 | 21/5/1997 | Chateau Carreras , Córdoba, Argentina | Tour Match |
| Buenos Aires | 21.0 | 24/5/1997 | Cricket & Rugby Club, Buenos Aires | Tour Match |
| Argentina A | 17.0 | 27/5/1997 | Cricket & Rugby Club, Buenos Aires | Tour Match |
| Argentina | 20.0 | 31/5/1997 | Estadio Etcheverri , Buenos Aires | Test Match |
| Cuyo | 8.0 | 3/6/1997 | Independiente Rivadavia, Mendoza | Tour Match |
| Argentina | 33.0 | 7/6/1997 | Estadio Etcheverri , Buenos Aires | Test Match |
| Australia | 25.0 | 12/7/1997 | Football Stadium , Sydney | Test Match |
Question:
What was the average of againsts on 21/5/1997?
Answer:
21.0