CREATE TABLE table_58270 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

Tell me the away team for venue of western oval
SELECT "Away team" FROM table_58270 WHERE "Venue" = 'western oval'
SELECT "Away team" FROM "table_58270" WHERE "Venue" = 'western oval'