Teacher:Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
Teacher: Now, understand the problem? Solve this instance: I purchased a Canon camera a couple of years ago and a Canon battery came with it. I bought a couple of generic brand batteries to use as backup. After a very short time, the generic brand batteries would only keep a charge for about ten minutes or less. Having learned my lesson, I purchased this additional Canon NB-5L battery for my backup. It holds a long charge and is very reliable. Don't waste your money on generic brands like I did, buy the name brand.
Student:
Positive