CREATE TABLE table_53939 ("Home team" CLOB, "Home team score" CLOB, "Away team" CLOB, "Away team score" CLOB, "Venue" CLOB, "Crowd" FLOAT, "Date" CLOB)

Which home team played at MCG?
SELECT "Home team" FROM table_53939 WHERE "Venue" = 'mcg'
SELECT "Home team" FROM "table_53939" WHERE "Venue" = 'mcg'