Instruction: Given a question and the related document, predict if the question is answerable based on the information provided in the document. Output only yes or no.

Input:
Question: how do I tighten it?
Document: This purchase received a 4 star rating because it lacks instructions on what to do. Especially with the light feature. Eventually it was figured out. While it has batteries accompanying it, they seem to be dead. A caution should be noted to be sure to tighten after adjusting the length so it doesn't collapse while in use. I do get many comments on it's look and that the light fixture is clever.
Unit is not too sturdy and slipped to shorter length once a while. Tighten ring on the crane should be better so it will not slip to shorter crane
I am a whisky drinking, cigar smoking, small, fat, 75 year old man that has a collection of canes, walking sticks and staffs and uses them all. This one is already one of my favorites and I had it less than 24 hours. The only thing I can complain about is that it did not come with directions or a whistle and compass. You say directions for a cane? Well, yes. I had been trying to turn the circular knobs between each of the three sections to tighten it.
It took me about five minutes to figure out I merely needed to twist each section in opposite directions to tighten it (or loosen it). This cane is ideal for climbing narrow, treacherous, icy, mountain trails. It can easily be extended into a staff when needing to descend steep areas. The flashlight will help you at night, whether climbing such trails or walking in your neighborhood. The cane is very attractive for an aluminum finish. It is also very masculine with its pick shaped handle. It would even go well with rugged clothing or a tuxedo, although I do not think Fred Astaire or Gene Kelly would be want to be seen with anything but their own walking stick.
I ended up ordering another one from a different company.
Very nice, and even fit into my checked luggage so I didn't have to deal with TSA.
this was a fantastic purchase . it is just what i need when i go out walking. I have received many compliments on its appearance.
I never could get the stick to lock down. If i put any weight on it, it simply slips down.
This is a very good walking stick for the price. I bought it for my wife who just had back surgery and it helps her when we go for walks.
I must have gotten a defective one. The locking ring needed a pair of pliers to turn and even then wouldn't lock.
Answer: yes