Complex sentence: In 1993, Senators Slade Gorton and Hank Brown did not take issue with the historical accuracy of the bill, but recently Slade Gorton and Hank Brown, American Senators who voted against this resolution, have described it as being a piece of historical revisionism.
Split into simpler sentences: In 1993, American Senators Slade Gorton and Hank Brown did not take issue with the historical accuracy of the bill, although they voted against it. More recently they have described it as being a piece of historical revisionism.