Complex sentence: In September 2014, Mann announced that he had been diagnosed with early-onset Alzheimer's disease, but plans to continue touring and performing with Spirit of the West as long as he remains able to do so.
Split into simpler sentences: In September 2014, Mann announced that he had been diagnosed with early-onset Alzheimer's disease. Mann has stated that he plans to continue touring and performing with Spirit of the West as long as he remains able to do so.