Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Claims undocumented

This book, while purported to be the truth, degenerates into nothing more than "it's true because I say so." Nothing is backed up with anything more than someone's version, and neither of the authors actually served with John Kerry. By besmirching this documented war hero, these people are tarnishing all vets, and all because Mr. Kerry came home from the war determined to stop it before more young men died. For shame, both of you authors. For shame.Besides, the writing is atrocious.