Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: does this knife lock?
Document: My friend ordered this knife to give to his son in law for Christmas. And He likes it a lot
what's there to say? It's a pocket knife. My husband's happy with it. Bought to replace a lost one of his.
We always give our grandson and aon in law a knife for christmas, this is the one we chose ! It was perfet for them both!
Not as good as the American made ones were, but still a good knife for the price. I like it.
This is a great knife! My teenage son loves the knife.He collects knives and this one is just like his Pepa's.
The knife is made well, very pleased with the quality of it and the price as well. Looks just like my grandfathers of one.
My grandson was so very pleased with this pocket knife. All the men in the family advised me to buy this brand and I am glad I did
great knife, it meets all my needs at work and home, it nice to have a little bit of history working with a old timer.
In knife terminology this knife &#34;Walks and Talks&#34; as te best knives should do. Very happy to have made this purchase.
Good weight. sharp blades out of the box. easy to open for my arthritic hands. Nice knife to have. one more word
Answer: yes