CREATE TABLE table_77821 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

Which Home team has a Venue of mcg?
SELECT "Home team" FROM table_77821 WHERE "Venue" = 'mcg'
SELECT "Home team" FROM "table_77821" WHERE "Venue" = 'mcg'