Complex sentence: The band members insisted that they had returned with the intention of carrying on with Byzantine, although it was announced on August 17,2010, that original guitarist and founding member Tony Rohrbough would not be remaining with the group.
Split into simpler sentences: The band members insisted that they had returned with the intention of carrying on with Byzantine. However it was announced on August 17,2010, that original guitarist and founding member Tony Rohrbough would not be remaining with the group.