Assertion: orchestra's conductor | /r/HasProperty | his longest association
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text: Another significant relationship was with the famously reclusive conductor Carlos Kleiber, who appeared with the orchestra first in 1974 and last in 1994, his longest association with any ensemble, even if it included only 30 appearances; Clemens Hellsberg wrote of the "contrast between those dry numbers and the defining experience which each encounter with this brilliant interpreter represented.