CREATE TABLE table_20767 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Ground" TEXT, "Crowd" FLOAT, "Date" TEXT)

Who are the away teams when subiaco oval was the grounds?
SELECT "Away team" FROM table_20767 WHERE "Ground" = 'Subiaco Oval'
SELECT "Away team" FROM "table_20767" WHERE "Ground" = 'Subiaco Oval'