Complex sentence: Etan Kalil Patz (October 9,1972--May 25,1979 (Disappeared); legally declared dead in 2001) was a kidnapped American child who was 6 years old when he disappeared in lower Manhattan, New York on May 25,1979.
Split into simpler sentences: Etan Kalil Patz (October 9,1972--May 25,1979 (Disappeared); legally declared dead in 2001) is a kidnapped American child. He was 6 years old when he disappeared in lower Manhattan, New York on May 25,1979.