CREATE TABLE table_15457 ("Date" CLOB, "Home captain" CLOB, "Away captain" CLOB, "Venue" CLOB, "Result" CLOB)

Which Home captain has a Venue of melbourne cricket ground?
SELECT "Home captain" FROM table_15457 WHERE "Venue" = 'melbourne cricket ground'
SELECT "Home captain" FROM "table_15457" WHERE "Venue" = 'melbourne cricket ground'