Instruction: Evaluate the answerability of a question by analyzing the related document, outputting yes if the document contains information addressing the question, and no otherwise.

Input:
Question: How to close the knife? I opened it and seems it's stuck. Thanks!
Document: I will buy more knives. Same colour & black too.
Very solid and well finished product, and very sharp. I really like the size and the quality of the materials used. It's all metal.
Answer: no