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

Example Input: At 80" iong, this is an extra long twin, not a standard twin. Consequently I had to take back the sheets I bought, as they were 5" too short. I would have ordered a different model had I known that 80" wasn't standard. It's easier just to replace the sheets and I don't have time to send the bed back.
Example Output: Negative

Example Input: THE BEST SAUCE YOU COULD EVER PUT ON YOUR TABLE AND USE ON YOUR COOKING ON JUST ABOUT ANYTHING, BRINGS THE COSTARICAN SPIRIT ON YOUR MEALS!
Example Output: Positive

Example Input: Great value for a surge protector. I've got 'em on lots of electronics (printers, phones, laptops) that don't need a full power strip or universal power supply (UPS). Very portable for laptops, in case you're travelling.
Example Output:
Positive