Instruction: Given a question and its related document, determine if the question is answerable by analyzing the information in the document. Output yes if the document addresses the question, or no otherwise.

Input:
Question: Is this glass or plastic?  Some of the answers and review say the material is plastic?
Document: The corner pieces  of the sconce were bent and broken upon arrival. No hassle return through Amazon Prime, though.
Pretty, easy to install. Classic look for our older home. We used LED bulbs and the end result is beautiful.
Answer: no