Complex sentence: The U.S. Office of War Information (OWI) was an agency of the United States Government created in June, 1942 which prepared and disseminated information and propaganda regarding World War II directed at the American public.
Split into simpler sentences: The U.S. Office of War Information (OWI) was an agency of the United States Government created in June 1942. The Office prepared and disseminated information and propaganda regarding World War II to the American public.