In this task, you're given a review from Amazon's food products. Your task is to generate a rating for the product on a scale of 1-5 based on the review. The rating means 1: extremely poor, 2: poor, 3: neutral or mixed, 4: good, 5: extremely good. 

Example Input: Google "propylene glycol" to find out why.  I bought this product, along with several others, without running the ingredients by my wife first (a nurse of 30 years) she was surprised when she noticed it.. we went a googling, and poured my $50 order down the drain afterwards.  There's "pure" and then there's "not so much".....  from the website:  [...]  Propylene Glycol  A cosmetic form of mineral oil found in automatic brake and hydraulic fluid and industrial antifreeze. In the skin and hair, propylene glycol works as a humescent, which causes retention of moisture content of skin or cosmetic products by preventing the escape of moisture or water. The Material Safety Data Sheet warns users to avoid skin contact with propylene glycol as this strong skin irritant can cause liver abnormalities and kidney damage. Also used in:    Tyre sealant   Rubber cleaner   De-icer   Stain removers   Fabric softener   Degreaser   Paint   Adhesive   Wallpaper stripper  I wrote the company about this concern and they never responded....
Example Output: 1

Example Input: This food is great - all ages dogs.  I have a 3 year old and a puppy.  They are both so soft and hardly ever get sick.  The food is good especially when you have Amazon Prime shipping  :)
Example Output: 5

Example Input: Olive oil in large bold print on the front of the bag is misleading!!  Olive oil is NOT the main oil the chips are cooked in.  The product has more sunflower, corn and canola oils than it does olive oil!! The ingredients are NOT listed in the description.  I should have known better. There are other, much better "Olive Oil" potato chips on the market that use ONLY olive oil. I was quite disappointed in this brand.
Example Output:
3