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Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

This is the only official history of the giant utility that serves most of northern and central California. Written in 1950, when the company (and its official biographer) were heedless of the changes that the future held in store for the energy industry overall (and utilities in particular) as well as for the end of unbridled growth and development in the state of California. Coleman is a real booster for PG&E. If you want the PR line, from the generation that build the company between 1930 and the 1950, this is the reference book you want.
Output:
Negative