CREATE TABLE table_55284 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What was the away team at mcg?
SELECT "Away team" FROM table_55284 WHERE "Venue" = 'mcg'
SELECT "Away team" FROM "table_55284" WHERE "Venue" = 'mcg'