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: What is the warrenty period for this fann?
Document: Seems to be working as suspected. Only installed for couple weeks. Quiet in the attic and installation was fairly simple.
It was nice to be able to find a blower that I thought would fulfill my needs at a reasonable price. Since this is a job where I have to crawl under my house, I, waiting for a time when it will be warm under the house to install it,
Installed in the attic of a public men's room. Tapped into existing 4&#34; duct work and wired to old dead noisy fan power. Nice powerful and very quiet
I installed two of these fans in the attic. One for each bathroom. They are much better at removing the moisture from the hot shower, and they are sooo much quieter than the ceiling mounted fans they replaced.
Answer: no