Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Year | Conductor | Opera House or Orchestra | Label | Countess | Count | Flamand | Olivier | La Roche | Clairon |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1953 | Clemens Krauss | Bavarian Radio Symphony Orchestra | Walhall Eternity Series | Viorica Ursuleac | Karl Schmitt-Walter | Rudolf Schock | Hans Braun | Hans Hotter | Hertha Töpper |
| 1957-58 | Wolfgang Sawallisch | Philharmonia Orchestra | EMI Classics | Elisabeth Schwarzkopf | Eberhard Wächter | Nicolai Gedda | Dietrich Fischer-Dieskau | Hans Hotter | Christa Ludwig |
| 1960 | Karl Böhm | Vienna State Opera | Omega Opera Archive | Elisabeth Schwarzkopf | Hermann Uhde | Anton Dermota | Walter Berry | Paul Schöffler | Christel Goltz |
| 1964 | Georges Prêtre | Vienna State Opera | Omega Opera Archive | Lisa Della Casa | Robert Kerns | Waldemar Kmentt | Walter Berry | Otto Wiener | Christa Ludwig |
| 1971 | Karl Böhm | Bavarian Radio Symphony Orchestra | Deutsche Grammophon | Gundula Janowitz | Dietrich Fischer-Dieskau | Peter Schreier | Hermann Prey | Karl Ridderbusch | Tatiana Troyanos |
| 1983 | Heinrich Hollreiser | Vienna State Opera Orchestra | Lyric Distribution | Gundula Janowitz | Hans Helm | Peter Schreier | Gottfried Hornik | Theo Adam | Christa Ludwig |
| 1994 | Ulf Schirmer | Vienna Philharmonic Orchestra | Decca | Kiri Te Kanawa | Håkan Hagegård | Uwe Heilmann | Olaf Bär | Victor von Halem | Brigitte Fassbaender |
Question:
When dietrich fischer-dieskau is the olivier who is the conductor?
Answer:
Wolfgang Sawallisch