This was a very surprising discovery the fact that in this work Langgaard who was relatively unknown and normally regarded as extremely conservative was in many respects ahead of his time Sfrernes Musik was performed in Sweden Stockholm in 1968 and thus introduced a renaissance for Langgaard and his music

Can you repeat this sentence, but add in punctuation?
This was a very surprising discovery - the fact that in this work Langgaard, who was relatively unknown, and normally regarded as extremely conservative, was in many respects ahead of his time. Sfrernes Musik was performed in Sweden (Stockholm) in 1968, and thus introduced a renaissance for Langgaard and his music.