Complex sentence: Following severe illness in June 2014, Ashok Kumar was admitted to hospitals in Hyderabad and Chennai where he had undergone treatment for a period of about six months before passing away on 22 October 2014 at the age of 73 in Chennai.
Split into simpler sentences: Following severe illness in June 2014, Ashok Kumar was admitted in into hospitals at Hyderabad and Chennai where had undergone treatment for a period of about six months. His health deteriorated before passing away on 22 October 2014 at the age of 73 in Chennai.