You will be given a definition of a task first, then some input of the task.
Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

I wanted to read this before seeing the film. Wow, what a bore. Keel's book reads like some scatter-shot diary with himself as the narrator. Maybe this stuff was revelatory back when it was originally published, but now with the X-Files cultural phenomena and all the other media about UFOs and the paranormal floating around, this seems pedestrian in comparison. The descriptions are always the same. Only the names change each chapter/sighting/contacting.Also, DO NOT READ THIS BOOK before seeing the movie. It will sap some of your enjoyment from Mark Pellington's excellent film (in fact, I was amazed at how well screenwriter Richard Hatem took this dross and put a narrative structure around it, but that's another review that belongs elsewhere....)
Output:
Negative