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

Ex Input:
Bought this for my 5 year old Justice Leaguer. My son is not a rough player but we went through 4 (YES, FOUR) of them before we finally got one where the elevator didn't break in the 1st 2 weeks. Mattel needs to get their act together and design toys that have durability. VERY disappointing!

Ex Output:
Negative


Ex Input:
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.

Ex Output:
Positive


Ex Input:
Shipped promptly! Just what dauther needed and in time for her to read for her English class! I would recommend!

Ex Output:

Positive