Original sentence: Examples of areas that some have attempted or have claimed others attempted historical revisionism (negationism) include: Japan's comfort women, Holocaust denial and Soviet history.Historical revisionism refers to the sometimes to some-degree successful attempt to change commonly held ideas about the past.The Guns of August, for example, was considered a fairly well-written work covering the first month of World War I but was written by an amateur historian.The distinction between professional historian and mass media historian, of course, is more complex in an age of semi-professional/popular history
Edited sentence: Examples of historical revisionism (negationism) include: Japan's comfort women, Holocaust denial and Soviet history.Historical revisionism is the attempt to change commonly held ideas about the past