Definition: Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
Input: I had used this product at the urging of the pet store clerk. He claimed he had over 20 ferrets and at one time had a flea problem. I vacuumed, sent the dog to the groomers for a flea dip, then came home and sprayed the entire house. I returned after a few hours, opened the widows and started up the air conditioners and picked up the dog. The next day I noticed several adult fleas, though they were sluggish. I thought..great! Then the family started getting bites and seeing small and adult fleas. I feel I wasted my money for a product that seemed to give us 24hrs of relief. Forget the claim that it keeps on acting for up to 7 mos. I am not infested with fleas, but we still have them.....and they are alive and well.
Output:
Negative