Instruct: Classify Amazon reviews into positive or negative sentiment
Query: It is too good to be true....

If Rawicz's account of his escaping from the Soviet prison were true, it would be one of the most extraordinary testament to the human endurance. The author claimed that during the crossing of the Gobi desert in the middle of the summer, the escaping party didn't have a single sip of water for as long as fourteen days, ( whereas a normal human being needs as much as a gallon of water per day just to survival). Rawicz's account of crossing the Himalayan mountain range during the winter without food supply makes his story even less believable. He even claimed the party throwing rocks to a couple of Yeti to make them move out of the way! Little wonder in the fifty years since the book was first published, nobody else has confirmed Rawicz's story. One should read Heinrich Harrer's "Seven years in Tibet" for a little appreciation of just how much effort is needed to walk across the Himalayan range.