Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: Are the crystals made of glass or plastic?
Document: was easy to assemble and easy to install. 3 extra crystals were also sent just in case of any were broken.
This was a great lighting fixture. We didn't receive the chain to cover the cord and contacted the company through Amazon...we received it almost immediately. We didn't hard wire this, we got supplies at a local hardware store and made it &#34;plug in&#34;. Works great and supplies a lot of light to the room.
I have been shopping for quite some time for the right light in my dining room. Well I found it! It is the perfect size for the room and it definitely is the focal point which all our company comments on. Looks gorgeous at night with the light on. My husband installed it with minimal difficulty. The crystals were simple to hang and plenty of extras in case they are needed. Thank you amazon for listing this beautiful light!
The chandelier is so beautiful with nice dangling crystal pendants. It was easy to put together with quality wires/hardware that the pendants hang with. It took minutes to put the crystal pendants on and under an hour to hang from the ceiling. This chandelier arrived to my door step in less than 24 hours. I was pleased because I had to send my first choice back for a refund because of missing pieces and cheap hardware that made it nearly impossible to put together.
Was looking for a light fixture that was feminine and a classic design. This stood out in my search compared to other sights in style and price. The proportions are perfect for a medium size room.
Very nice light, is just as described, does take about 30-45 minutes to assemble, definately worth the time and effort.
This assembled so beautiful.my only complaint were the crystal had a few pieces cracked but had extra in box. It' really looks awesome
The lamp is beautiful. I reside in an apt and could not have the lamp attached directly to the ceiling so, I have it hung from the ceiling with a plant hook. I had to have a plug attached to it so that I could connect it to a wall outlet. I will need to add a switch to the electric cord so that I may switch it off versus unplugging it from the wall outlet. Otherwise, I recommend this product.
It really surprised me once I put it up. Looks high end and I get lot's of compliments from friends.
I ordered 2 for Christmas gifts; one for my daughters home-office (her style is elegant-cottage) and the other for our 17 year old daughters bedroom and the styles were perfect for both our girls taste! I was really pleased with the appearance, size  and shape of the drum shade as well as the prisms. I would absolutely recommend fixtures and was not disappointed!
Answer: yes