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

Example Input: i think sudden fear is a very good example of the so called films noirs and also joan crawfords performace is very convincing as the frightned woman who tries to save her life as well as she can
Example Output: Positive

Example Input: I was looking for a shower door that could open from either the left or the right and I did not want one to choose for me. This door ticks and fits all the right boxes in that department. I like the crystal glass effect too. It is very clear and allows a lot of light into the shower hub. It is frameless too which is what was asked for by the wife.Its sturdy quarter of an inch thick glass also is a nice feature. But most of all the pivot door is a feature I got on with too.
Example Output: Positive

Example Input: It only lasted for less than 3 months then there was 2 holes that I fixed but still there was a leak somewhere and eventually I just threw it away. I don't recommend this air mattress.
Example Output:
Negative