Complex sentence: In 1956 she was the Kostelnicka in the new Covent Garden production of Janáček's "Jenůfa", a role she sang with distinction for over 20 years.
Split into simpler sentences: In 1956 she was the Kostelnicka in the new Covent Garden production of Janacek's Jenufa. A role she sang with distinction for over 20 years.