Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_12 (against VARCHAR, opposing_teams VARCHAR, date VARCHAR)
### Question:
What is Against, when Opposing Teams is "Australia", and when Date is "27/07/1991"?
### Answer:
SELECT against FROM table_name_12 WHERE opposing_teams = "australia" AND date = "27/07/1991"