Complex sentence: The placement of the Kitchener poster designed by Alfred Leete has been examined and questioned following an Imperial War Museum publication in 1997 suggesting that the poster itself was a'non event' and was made popular by postwar advertising by the war museum.
Split into simpler sentences: The placement of the Kitchener posters including Alfred Leete's design has been examined and questioned following an Imperial War Museum publication in 1997. The War Museum suggested that the poster itself was a "non event" and was made popular by postwar advertising by the war museum.