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: Are these actual hinges or purely decorative? If real, how much weight will a pair support?
Document: These hinges are excellent quality. They're heavy, well built and look exceptional. Only reason I didn't give them 5 stars is box there were no installation instructions. I'm not an amateur so I was able to figure it out but as far as product goes, everything should have an installation manual.
Answer: no