Instruction: Evaluate the answerability of a question by analyzing the related document, outputting yes if the document contains information addressing the question, and no otherwise.

Input:
Question: when tightening the longest bolt, in the upper portion of the table bed model 960,  it doesn't tighten fully, is this normal?
Document: My husband and I  purchased the TEETER EP-960 nearly one month ago. We have used a number of inversion devices over the years, but have never owned a table. I did a lot of research and kept coming back to the Teeter. Then decided it was worth the money to upgrade to the 960. It is so worth it. It went together well (needs two people to be really easy), and all the parts were there. Video instructions are quite clear.
So I had to do a lot of stretching exercises for that area. I got the inversion table EP-960 Ltd. and when I first got on I could feel muscles and scar tissue from a previous surgery pulling and thought ugh oh. But I eased my way by using the strap and not inverting the whole way for about a week then I went to the next color on the strap so forth and so on and now I am almost at full inversion.
I've only had this table for a week now. I noticed that my back feels much better even after such a short time. The first night, I used it for a couple of minutes before I went to bed. I used the full inversion & felt several vertebrae adjust. That night I slept for 10 hours straight. I hadn't slept that soundly in a long time!
the frame is sturdy and seems it will last a long time. I got the EP-960. However, the back section is plastic and flimsy. Don't understand why they went cheap on one of the most important parts. For $500.00 I expected better construction.
First off, THANK YOU to all who have shared their inversion experiences on Amazon.like many, i saw the television commercial and was highly motivated to find some relief for my worsening back problem. based on the very positive tone of more than 100 reviews i ordered the 960.i have a Grade 2 (20%) displacement of my L4/5 Vertebrae and endured a couple of episodes (last Nov and mid Feb) that, let's say, weren't pleasant.
since purchasing it one of my brothers, who has a similar back problem, purchased a 960 after doing a couple of minutes on my machine. he said his back immediately loosened and he felt better after 3 minutes than he had felt in years.i combined my 960 with a Tempurpedic memory foam 3 inch mattress topper (around $400) and now sleep almost thru the night.i of course can't speak for other types of back problems but the 960 is my new best friend. .
I have been using the teeter table a month and I don't think at this time I will need any of their recommendations.
The whole family has enjoyed the teeter hang ups table! Went together quickly and works great!!! Delivered on time! I relax just rocking on the table
This is the smoothest, most comfortable table I have ever used. Some people complain about their ankles, but this machine holds onto my feet better than any other inversion table I have tried. The foot rests themselves can be turned upside down which is a very important adjustment.
Mechanism is smooth, feels solid and safe, and I really love the lock-in position. Table is more compact than I imagined and we can actually leave it up in the living room most of the time. Easy to adjust  to accommodate different weights and heights.
Answer: no