Complex sentence: In September 2013 an announcement was made that Billy had undergone minor surgery for early stage prostate cancer also included in the announcement was that he is being treated for the initial symptoms of Parkinson's Disease.
Split into simpler sentences: In September 2013 an announcement was made that Billy had undergone minor surgery for early stage prostate cancer. The announcement also stated that he is being treated for the initial symptoms of Parkinson's Disease.