Part 1. Definition
Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
Part 2. Example
I've read this book with much expectation, it was very boring all through out the book
Answer: Negative
Explanation: Review writer does not like the book because it was boring, therefore it is a negative review.
Part 3. Exercise
The adapter quit working after 3 hours of use. I returned it and got a full refund. The customer service for the return and refund was excellent, and I would not hesitate to deal with this company again. But I won't buy any replacement power adapter for a 4-year-old laptop again. I got a new laptop.
Answer:
Negative