CREATE TABLE table_203_400 (id NUMBER, "district" CLOB, "vacator" CLOB, "reason for change" CLOB, "successor" CLOB, "date successor\ seated" CLOB)

which district has the earliest date that a successor was seated ?
SELECT "district" FROM table_203_400 ORDER BY "date successor\nseated" LIMIT 1
SELECT "district" FROM "table_203_400" ORDER BY "date successor\nseated" FETCH FIRST 1 ROWS ONLY