Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: why is this machine better than the $250 one that amazon sells??
Document: Been looking for one of these for almost a year now. That is, one I can afford. Thanks to Amazon for carrying  this one . It was easy to purchase and I am starting to enjoy the benefits already.
I purchased this machine in Dec of 2009 and couldn't be more pleased with it. I have Multiple Sclerosis and was looking for a way to help relieve chronic pain. This machine not only helps with the pain management but I was also able to lift my feet a few inches for the first time in approx 15 years.It did not help me lose weight but It was worth every penny and a great investment.
Looking forward to seeing the difference it will make after a year of use.Delivery was days before the due date , right to the house.
Bought this for my husband, who has a number of health issues and is unable to exercise in the usual manner. He has actually used it without me &#34;suggesting&#34; him to do so. I'm hoping he'll begin to use it on a more regular basis so we'll begin to reap the benefits that we're expecting.
Answer: no