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: I am on a low glycemic index diet to help control my blood sugar and hormone levels. My nutritionist recommended agave nectar as a sweetener since it's GI index is in the low 30's as opposed to honey in the low 50's and sugar in the mid-50's. I've tried supermarkets, health food stores and wholesale clubs. The prices are usually around $13 for a 32oz bottle and this is $19ish for 2x46oz. It's used like honey - substitute 2/3c for every 1c sugar and reduce liquids by 1/4th.  I also use it in a carrot cake recipe (equal substitution) instead of sugar where I substitute whole wheat flour instead of white flour and I don't decrease the other liquids. It's delicious and you'd never know that's it's actually good for you.
Example Output: 5

Example Input: Do not buy this product.  You will not be doing your infant any favors.  If at all possible, you should be breastfeeding.  (I know it's not always easy or convenient.)  If you can't then in my opinion the best formula is Earth's Best and even that is disappointing.  Basically, they dry cow's milk and remove all the natural nutrients then "fortify" with synthetic vitamins/minerals.  Pathetic.  Just buy whole organic milk, raw if possible.  There are recipes online to make it closer to human breast milk.  Sorry to be so matter of fact.  I'm losing patience for all these evil corporations capitalizing on the "green" movement.  OH and by the way the second ingredient in this garbage is sugar!!! Good way to start the diabetes/obesity while they're young!
Example Output: 1

Example Input: YES, these are wonderful and healthy cookies, but this is a rare bad deal from Amazon (really DAB Nutrition)- they are charging about $25 (including shipping).  In less than a minute of web searching I found the same quantity for about $15 shipped.  Enjoy the cookies, but buy from someone else until the price comes down.
Example Output:
4