Complex sentence: John B. Alexander (born 1937) is a retired U.S. Army infantry officer and colonel and a leading advocate for the development of non-lethal weapons and of military applications of the paranormal.
Split into simpler sentences: John B. Alexander (born 1937) is a retired United States Army colonel. An infantry officer for much of his career, he is a leading advocate for the development of non-lethal weapons and of military applications of the paranormal.