CREATE TABLE table_51921 ("Home team" TEXT, "Home team score" TEXT, "Away team" TEXT, "Away team score" TEXT, "Venue" TEXT, "Date" TEXT)

Which home team has a Venue of corio oval?
SELECT "Home team" FROM table_51921 WHERE "Venue" = 'corio oval'
SELECT "Home team" FROM "table_51921" WHERE "Venue" = 'corio oval'