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: Is it concave?
Document: love the skateboard, smooth and awesome to use and plus, i love the picture so much hehe thank you very much!
it is everything it describes it is,awesome love it rides smooth love everything about it worth the price thank u
This is really amazing due to the fact that the price is so low and its performance was spectacular. I would really reccomend this board to every due to the fact the price is really cheap. Everything ran smooth and perfect and totally recommend it!
This board is so smooth&&fast I loved it!. It does nice turns after you loosen up the trucks. One of the BEST deals out there. It's a steal! (:
My board  arrived today ,5/16, around 11 this morning. I must say I'm Very impressed with this board. It's a carving machine! I did have to make a few tweaks with the trucks and wheels,which is expected with any board, but overall it's a great board. The graphic does seem to come off easily, unfortunately. I have to say I love it. The flex on it is amazing as well. I recommend this board if you're looking to cruise around and carve.
It's a very affordable board. It's great for a newbie like me. It was delivered incredibly fast. It's so amazing how fast it took. I'm a very satisfied customer.
I was very disappointed, this board looked very cheap. The print on the board is very blurry and doesn't look like the pictures above. Also this longboard didn't feel sturdy, I was almost scared that it was going to break when riding it. I tried to return it but was unable to since I rode it down my street and once it's been used you no longer qualify for a refund. I would suggest to try it out indoors to get a feel for the board and make sure you like it.
I started skateboarding again and needed a good skateboard I seen this one and it caught my eye. First I love the price and then when I receive it at home it was love at first sight and ride. It is smooth , fast , and I love it can't wait for the spring to ride on a good down hill street. it's beautiful , smooth ,fast and the price was great, I totally ,totally , Recommend this cool skateboard . Totally !! !
Awesomeness!!! I love this board! The wheels may need to be loosened a little but besides that, this is an awesome board for a great price.
Answer: no