Original: Messiaen had also been composing a concerto for four musicians he felt particularly grateful to, namely Loriod, the cellist Mstislav Rostropovich, the oboist Heinz Holliger and the flautist Catherine Cantin.
Simplified: Messiaen had also been composing a concerto for four musicians he felt particularly grateful to: his wife Loriod, the cellist Mstislav Rostropovich, the oboist Heinz Holliger and the flautist Catherine Cantin.