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: are there elbow pads and knee pads a total of 4 pieces or just 2
Document: Very good product, colorful and resistent. Good quality. My son in enthusiastic and his friends are jealous!+++ jack d .
My grand Nephew is going to love it. He had a set last year, but he lost them. I was so thankful I found them on your site.
Answer: no