Read the text and determine if the sentence is true (see options at the end):

Dionysos is an opera by Wolfgang Rihm based on Friedrich Nietzsche's "Dionysian-Dithyrambs". The composer wrote the libretto and subtitled his work: "Opernphantasie nach Texten von Friedrich Nietzsche / Szenen und Dithyramben" ("Operatic fantasy after texts by Friedrich Nietzsche / Scenes and dithyrambs). It premiered at the Salzburg Festival on 27 July 2010.

Sentence: The opera was first performed publicly in Austria in the summer of 2010
Select from the following.
-- Yes
-- It's impossible to say
-- No
Yes