CREATE TABLE table_54379 ("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's score at the game held at MCG?
SELECT "Away team score" FROM table_54379 WHERE "Venue" = 'mcg'
SELECT "Away team score" FROM "table_54379" WHERE "Venue" = 'mcg'