CREATE TABLE table_73392 ("District" CLOB, "Vacator" CLOB, "Reason for change" CLOB, "Successor" CLOB, "Date successor seated" CLOB)

Name the date successor seated for delegate seat established
SELECT "Date successor seated" FROM table_73392 WHERE "Reason for change" = 'Delegate seat established'
SELECT "Date successor seated" FROM "table_73392" WHERE "Reason for change" = 'Delegate seat established'