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

Ex Input:
Just "assembled" the bat cave for my 5 year old. Pathetic construction and workmanship -- half of the gimmics don't work. Another pile of injection-molded plastic parts and stickers that I get to assemble -- what is this thing -- $4 of raw materials + $2 of shipping + $10 of marketing? Garbage. Shame on you Mattel, the only thing worse is the batman figures with the batarangs that take 30 minutes and a blowtorch to get out of the packaging. This batcave will collapse and die within hours of play, I'm sure of it. GARBAGE!

Ex Output:
Negative


Ex Input:
I've heard it said that this is Kerouac's greatest novel. I still say that honor is held by On the Road, but this book is just as good. And it is his most spiritual novel. Kerouac combines his talent at writing with his philosophy of life and what you have is a powerful tool to enlightenment. This book should be read on at least two levels, as a work of great literature and as a theological tool. I can't recommend it enough.

Ex Output:
Positive


Ex Input:
it inflated easily and was very firm, by the morning i noticed it was considerably softer, and as i sit here now typing this i find myself gradually getting closer to the floor. easy enough to reinflate, but still, this should not happen the first night.

Ex Output:

Negative