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

Let me give you an example: I've read this book with much expectation, it was very boring all through out the book
The answer to this example can be: Negative
Here is why: Review writer does not like the book because it was boring, therefore it is a negative review.

OK. solve this:
I've had 6 of them for 1 month and one of them got lips chiped out already. (which one of the reviewer already commented that it happens often with these mug). It was sadly tossed out and now I'm worried they will eventually all dissapear out of my kitchen.Keep them apart from each other when you wash them. The slightest touch will chip it out unexpectedly.BTW: You can buy them individually at Bed and Bath Beyond for less price.
Answer:
Negative