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

Ex Input:
Needed place for kids to sleep while visiting grandma and now they argue over who gets to sleep on the air mattress. Both think it's more comfy than their bed at home.Would have given 5 stars, but the bag it comes with to put it in is worthless, no chance of ever getting it in there again.

Ex Output:
Positive


Ex Input:
Do not buy this toy. If you are given this toy as a gift, return it for store credit. This is a flimsly and poorly designed stack of platic and paper. The secret door doesn't work, the elevator doesn't slide and toys get stuck in there. The suggested 10" batman doesn't work with the zip line, bungee or even the elevator. The add says "Using new adhesive technology, you can set up the Batcave on just about any wall" so they want us to glue this thing on to a wall.Please don't buy this toy.

Ex Output:
Negative


Ex Input:
This is the first time I have purchased hiking boots online. I hike a lot. 40+ miles per week generally. I wear out hiking boots in about four months, and am getting tired of driving all over the place trying to find something that fits, and isn't too expensive. These are great! Comfortable right out of the box. Sturdy but still flexible enough to move with your foot. I have only just started with them - but at this price, and with the Amazon Prive fast and free shipping: I will be coming back here for more when I wear the treads off of these in a couple hundred miles.

Ex Output:

Positive