Complex sentence: Fairuz's first large-scale concert was in 1957, as part of the Baalbeck International Festival which took place under the patronage of the Lebanese President Camille Chamoun, and where she performed alongside the British prima ballerina Beryl Goldwyn and the Ballet Rambert.
Split into simpler sentences: Fairuz's first large-scale concert was in 1957, as part of the Baalbeck International Festival which took place under the patronage of the Lebanese President Camille Chamoun. She performed alongside the British prima ballerina Beryl Goldwyn and the Ballet Rambert.