CREATE TABLE table_8945 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Ground" TEXT, "Crowd" FLOAT, "Date" TEXT, "Time" TEXT)

When was the match with an away team score of 13.15 (93)?
SELECT "Date" FROM table_8945 WHERE "Away team score" = '13.15 (93)'
SELECT "Date" FROM "table_8945" WHERE "Away team score" = '13.15 (93)'