CREATE TABLE table_31319 ("Year" CLOB, "Conductor" CLOB, "Opera House or Orchestra" CLOB, "Label" CLOB, "Countess" CLOB, "Count" CLOB, "Flamand" CLOB, "Olivier" CLOB, "La Roche" CLOB, "Clairon" CLOB)

When dietrich fischer-dieskau is the olivier who is the conductor?
SELECT "Conductor" FROM table_31319 WHERE "Olivier" = 'Dietrich Fischer-Dieskau'
SELECT "Conductor" FROM "table_31319" WHERE "Olivier" = 'Dietrich Fischer-Dieskau'