Definition: In this task, you're given reviews from Amazon's products. Your task is to generate the Summary of the review.
Input: I have a degree in science and am very interested in pain control methods. It was interesting to read about the origin and history of Opium. But when the author started going in depth about how to extract the morphine and make Heroin, my interest was lost; I didn't even read the last 20 pages. I didn't expect the author to give the "recipe" for heroin. I was a bit disappointed about that.

History of poppies and opium interesting. The "recipe" for heroin?Lost my interest.