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: is this ball weighted or light weight?  I am looking for a ball that is not heavy..
Document: I love this ball, its sturdy and plenty large to do all the exercises recommended by my therapist. I would suggest it for anyone looking for a larger exercise ball.
it would've been nice if the description was listed prior purchasing. I had no idea that this ball is not anti-burst. so this ball can't do a lot of positions except for situps and stretching my upper back. I'm also not that heavy so i imagine that it will not burst on me but still, it would have been nice to get an anti-burst ball since all the gyms have it, too. therabands products just don't supply enough information or instructions on their website too. not reliable company.
This was for a friend of mine that LOVES yellow. I am very pleased with the quality of this exercise ball as well as being able to find this color for him.
This ball is big. I mean really big. It is appropriate for the tallest amongst us. Which is just what the literature said about it. Takes up a lot of space wherever you put it.
I use this ball daily as a chair, and unlike all the other exercise balls I've tried...this one has not required me to re-inflate a single time in the 3 weeks I've owned it so far.
I can't say enough good things about this ball. Far superior than any other ball I've owned! If you want a firm ball, you can't go wrong with this one. Great price and the shipping was incredibly fast!! !
Got this for my 12yr old son who loves it. He tried yoga with me once but wanted a smaller ball. Until then, I hadn't realized that the balls come in different sizes according to your height. (I'm fairly new to Yoga myself). He had it pumped and ready to go in 10 minutes.
I recently purchased a red 55cm Thera-band Pro Series excercise ball. I just thought I'd take a moment to let others know that, depending on the seller, the Thera-Band exercise ball you order may or may not arrive with all the parts you need to inflate it.
I ordered the green ball (65cm) based on their recommendations for my height, but the ball I received is actually about 45cm across--basically child sized, and I cannot use it for my workout. It is too bad because the ball seems sturdy and of decent quality, but I don't trust that if I try to reorder from this company it will come out correctly.
Maybe I have a lemon, but my copy of this ball is not entirely spherical. This lopsidedness makes it want to roll in unexpected directions, making it useless as an office chair replacement (its intended use) and downright dangerous as an exercise ball. It sounds crazy, but it almost acts as if it has a mind of its own. We inflated it and waited a few days to see if it would resolve itself, but it never did.
Answer: yes