Assertion: archduke trio | /r/HasProperty | byname of piano trio no.
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text: Archduke Trio, byname of Piano Trio No. 7 in B-flat Major, Op. 97, German Erzherzog-Trio or Erzherzogtrio, trio for piano, violin, and cello by Ludwig van Beethoven, which premiered on April 11, 1814, in Vienna.