When dietrich fischer-dieskau is the olivier who is the conductor?
CREATE TABLE table_31319 (
    "Year" text,
    "Conductor" text,
    "Opera House or Orchestra" text,
    "Label" text,
    "Countess" text,
    "Count" text,
    "Flamand" text,
    "Olivier" text,
    "La Roche" text,
    "Clairon" text
)
SELECT "Conductor" FROM table_31319 WHERE "Olivier" = 'Dietrich Fischer-Dieskau'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: When dietrich fischer-dieskau is the olivier who is the conductor? ### Input: CREATE TABLE table_31319 (
    "Year" text,
    "Conductor" text,
    "Opera House or Orchestra" text,
    "Label" text,
    "Countess" text,
    "Count" text,
    "Flamand" text,
    "Olivier" text,
    "La Roche" text,
    "Clairon" text
) ### Response: SELECT "Conductor" FROM table_31319 WHERE "Olivier" = 'Dietrich Fischer-Dieskau'