Question: What was the name of the period instrument ensemble that was formed in the 1950s by the conductor with whom Elisabeth Kulman recorded Beethoven's "Missa solemnis"?
Sentence (from "Elisabeth Kulman"): She has performed early operas such as Legrenzi's "Il Giustino" as well as new works, creating the role of Gora in the premiere of Reimann's "Medea" at the Vienna State Opera.
Relevant evidence: No