Complex sentence: The vast majority of the silent films recorded in the late 19th and early 20th century no longer exist; a September 2013 report by the United States Library of Congress announced that a total of 70% of American silent feature films are believed to be lost.
Split into simpler sentences: The vast majority of the silent films recorded in the late 19th and early 20th century no longer exist. A September 2013 report by the United States Library of Congress announced that a total of 70% of American silent feature films are believed to be lost.