CREATE TABLE table_11837 ("Name" CLOB, "Country" CLOB, "Reign began" CLOB, "Reign ended" CLOB, "Length" CLOB)

Whose reign began in Vietnam and ended in October 1005?
SELECT "Reign began" FROM table_11837 WHERE "Country" = 'vietnam' AND "Reign ended" = 'october 1005'
SELECT "Reign began" FROM "table_11837" WHERE "Country" = 'vietnam' AND "Reign ended" = 'october 1005'