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

[EX Q]: Although this is a wonderful working power adapter, I don't believe it is the Macally Adapter that was advertised. I am however happy with it and would shop with this vendor again.Thank you.
[EX A]: Positive

[EX Q]: why am I being asked to review a product I didn't purchase. Need to fix the system or allow me to delete the request.
[EX A]: Negative

[EX Q]: This book lacks the depth it seems to promise. Some of the illustrations are lacking. There is not enough meat to help anyone with special needs learners. I would suggest you look elsewhere. I was greatly disappointed since the majority of work by Jensen is wonderful.
[EX A]:
Negative