Complex sentence: The ensemble in Britten's War Requiem was written for the Melos Ensemble conducted by the composer in the premiere 1962 in Coventry and the first recording in 1963.
Split into simpler sentences: The ensemble in Britten's War Requiem was written for the Melos Ensemble. The composer conducted the Melos Ensemble in the premiere 1962 in Coventry and the first recording in 1963.