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 have always purchased Star-Kist tuna but thought I would try this brand for a change of pace. The taste of the tuna was not pleasant, too much basil and other spices for me.
Example Output: 3

Example Input: i had a second plant to replace the first one. it to came in sad shape, i should of went to a local nursery at least then i would of got a good plant. dont waste your time with this vender.
Example Output: 1

Example Input: Patak's makes the best curry around. I frequently use it in my Yellow Chicken Curry Dish which is a favorite with both my husband and seven year old.
Example Output:
5