CREATE TABLE table_203_89 (id NUMBER, "#" NUMBER, "name\ ( birth-death ) " CLOB, "took office" CLOB, "left office" CLOB, "monarch" CLOB, "prime minister" CLOB)

how many consecutive years did ernest george jansen serve as governor general of the union of south africa ?
SELECT "left office" - "took office" FROM table_203_89 WHERE "name\n(birth-death)" = 'ernest george jansen'
SELECT "left office" - "took office" FROM "table_203_89" WHERE "name\n(birth-death)" = 'ernest george jansen'