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: Will this work for keeping an upright piano in place and not damaging the linoleum floor?
Document: Oh my gosh, these work soooo great. Highly recommend this brand if you have wooden floors and your furniture slides all over the place.
I don't have rugs and I needed my sofa's not move on the floor. They work great, no matter how much the kids jump on the furniture. It stays put
Needed casters for two different couched to protect our hardwood. We tried stick on felt, but they just came off and made a gluey mess on the floor. One couch had square feet, so these were a slam dunk. The other had round nubs, and since these had the indentation in the middle, they work just as well there.
They work great! They also just blend in to the wood color of the couch legs so the cups aren't even noticable.
These cups work without slipping around. I've tried others and they don't stay put like these do. I would recommend them to others.
The caster cups work great on tile floors. The couch has round wheels and the casters fit perfectly. Glad I found them.
I started to think all square casters were lightweight things not up to the intended job. After 3 or 4 uses, this one seems like it will work just fine.
So many people are going with hardwood or laminate flooring these days which look great and are easy to care for but have a drawback in that furniture tends to slide. Bought these for my recliners and sofa and they work great at stopping the sliding issue..
These anti-slip grips work great on wood or tile flooring. However, these cups did not help the slipping of with the guest bedframe that has small wheels. Even with the brakes on the bedframe jumps the rubber lip of the caster cups.I end up using these under my kitchen table and couch, which have flat footers.
the caster cups kept my couch and chair from skidding on the wood floor that i just has polished. Excellent
Answer: no