Instruction: Given a question and its related document, determine if the question is answerable by analyzing the information in the document. Output yes if the document addresses the question, or no otherwise.

Input:
Question: What are the differences between the 1st and 2nd generation models?
Document: Have been using the Rock n Roll 2 for a month now and I love it. I still have it set as the default tension which seems really good as a starter. The rocking is very little and it allows you to target your form and core to reduce the bouncing as much as you can. You can definitely tell that your form is not good when you bounce a lot. You won't be able to feel that on a regular static trainer.
Answer: no