Instruction: Given a question and the related document, predict if the question is answerable based on the information provided in the document. Output only yes or no.

Input:
Question: What is the difference between the (18" full round) and the (18-inch full round) rollers - as they are listed with different prices. Thank you.
Document: Excellent quality and rock bottom price. I use it for physical therapy exercises daily. Strongly recommend it.
Answer: no