CREATE TABLE table_11839 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Crowd" FLOAT, "Date" TEXT)

What did the home team score at MCG?
SELECT "Home team score" FROM table_11839 WHERE "Venue" = 'mcg'
SELECT "Home team score" FROM "table_11839" WHERE "Venue" = 'mcg'