Complex sentence: Newspapers and school textbooks in the People's Republic of China still mention the "Tanaka Memorial" as fact without stating that not only the Japanese, but also most western historians, contend that the document is a forgery.
Split into simpler sentences: Newspapers and school textbooks in the People's Republic of China still mention the "Tanaka Memorial" as factual. However, most Japanese and western historians, contend that the document is a forgery.