CREATE TABLE table_74575 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

Who was the away team when the VFL played at MCG?
SELECT "Away team" FROM table_74575 WHERE "Venue" = 'mcg'
SELECT "Away team" FROM "table_74575" WHERE "Venue" = 'mcg'