Complex sentence: Peter John Ucko FRAI FSA (27 July 1938-14 June 2007) was Professor Emeritus of Comparative Archaeology, former Executive Director of University College London's Institute of Archaeology, and most notable for his organisation of the first World Archaeological Congress in 1986.
Split into simpler sentences: Peter John Ucko FRAI FSA (27 July 1938-14 June 2007) was an influential English archaeologist, noted for being the Professor Emeritus of Comparative Archaeology and also the former Executive Director of University College London's Institute of Archaeology. He was also noted for his organisation of the first World Archaeological Congress in 1986.