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 kind of steel?
Document: I have always trusted cold steel products, they are pricey but high quality and the edges always come razor sharp.
Cold steel hit a home run with this one. The warrior series swords are as beautiful as they are functional. I will be purchasing more for my collection.
cold steel weapons dont look that nice but they are the best brand out there. i have put this sword through a lot of tests like cutting bamboo to copper pipes and this sword has put up with it all.
Lastly, the lower carbon steel is tough and will bend before it breaks, but only up to a point. If you bend it too far or too often it will take a set and will need to be re-straightened. It would cost you more money to have this re-straightening done than you spent on the sword to begin with.
Go to chessinc.com and select a sword that blows any sword on amazon or similar sights out of the water for under 300 bucks. It's not that cold steel Japanese swords have lowered the standards fir their Japanese swords-though everything else they make has-it's just that you can do better for less.
I was both impressed and a little disappointed. Here is why. the sword is great as was the scabbard and bag for it. The edge was another matter, there were a few visable spots on the edge where it had rusted and it just wasn't sharp at all. The previous cold steel sword (katana) was wicked sharp and even the practice sword was sharper than this one. Getting it sharpened is really expensive so for now we just polished it.
I picked up the Cold Steel Warrior Seris Katana a few months back and was thoroughly impressed with it. Though some reported issues with the blade sharpness and some rust spots, mine arrived pristine and very sharp. I liked it so much I decided to order the matching wakazashi, and it too arrived sharp and spotless. These now reside in a two-sword stand in my office.
the only material that has been able to damage the razor sharp blade so far was a Damascus steel buck knife. (we train like the blade is sharp because it is.) this thing is not a wall hanger it is full tang sharp as a box cutter and very heavy like hatchet heavy its the thickness of two wall hangers glued together. if you manage to break this thing you are doing something you shouldn't be doing, like robot hunting.
As I read the reviews, I begin to wonder more and more if CS isn't writing some of these reviews on Amazon. The blade will come to you dull. You will spend around $300.00 on various grades of stones to sharpen it, and it will take approximately 4 months before the blade begins to perform in a way shown in the CS demo videos. After all that, the blade edge turns over easily on hard targets because this is the lowest grade of high-carbon steel on the market.
these coldsteel blades are amazing. they are the real deal. this is the second wakazashi that i've purchased, the exact same as the first. the first one was for my dad for Father's Day. this one is for my martial arts instructor. those are two people that i definitely wouldn't get anything sissy for. these are certainly not that. these are battle-worthy blades. Coldsteel will most definitely make a bigger name for itself over time. check em out!
Answer: no