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

[Q]: My husband and I were not able to attend a birthing class, so the doctor suggested we rent/buy a video. We decided on this one, and although the 'teacher' was a bit corny it was helpful. I especially liked that you could fast forward and skip parts! All in all it was a worthwhile purchase and proved helpful to us both.
[A]: Positive

[Q]: I have just spent 5 minutes trying to get this damn printer to print an envelope without mangling it. Wonderful.
[A]: Negative

[Q]: Good read. If half of what is written in this book is true; then are world is much stranger than we can imagine.One of my favorite books.
[A]:
Positive