CREATE TABLE table_name_12 (against VARCHAR, opposing_teams VARCHAR, date VARCHAR)

What is Against, when Opposing Teams is 'Australia', and when Date is '27/07/1991'?
SELECT against FROM table_name_12 WHERE opposing_teams = "australia" AND date = "27/07/1991"
SELECT "against" FROM "table_name_12" WHERE "27/07/1991" = "date" AND "australia" = "opposing_teams"