In this task, You are given a review of Amazon's food products. Your task is to divide them into two classes: negative or positive, depending on the content of the review.

[EX Q]: I have very hard water where I live. I use this once or twice a week and it really helps remove the build up on my hair. I'll definitely keep using this.
[EX A]: positive

[EX Q]: This chair was quick and easy to put together. Not only were the bolts well packaged they were clearly labeled to avoid any confusion and came with a few extras. The chair is comfortable with a mesh back that allows support without being hot. The lumbar support helps make this chair more comfortable and there is a padded headrest if you just want to lean back and watch a video for a bit. Overall, very affordable and quality built office chair. I'm happy with this and do recommend it.
[EX A]: positive

[EX Q]: Initially, the charger for the unit was defective so the whole massage gun had to be returned. However, a new one was sent out right away and works like a charm. Absolutely fantastic product
[EX A]:
positive