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

how old was gideon brand van zyl when he took office as governor ?
SELECT "took office" - "name\n(birth-death)" FROM table_203_89 WHERE "name\n(birth-death)" = 'gideon brand van zyl'
SELECT "took office" - "name\n(birth-death)" FROM "table_203_89" WHERE "name\n(birth-death)" = 'gideon brand van zyl'