Complex sentence: Warren was the film critic for a newspaper in Simi Valley, California during the 1980s, and in 1989 he created the ShowBiz Roundtable for the online service GEnie to generate discussions about movies of all sorts.
Split into simpler sentences: Warren was the film critic for a newspaper in Simi Valley, California during the 1980s. In 1989, he created the ShowBiz Roundtable for the online service GEnie to generate discussions about movies of all sorts.