CREATE TABLE table_40107 ("Championship" TEXT, "Current champion ( s ) " TEXT, "Previous champion ( s ) " TEXT, "Date won" TEXT, "Location" TEXT)

Which location held the Iron 8 Championship tournament?
SELECT "Location" FROM table_40107 WHERE "Championship" = 'iron 8 championship tournament'
SELECT "Location" FROM "table_40107" WHERE "Championship" = 'iron 8 championship tournament'