Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: what are they made of...do they rust?
Document: Very nice numbers, well made and great looking. The instructions were easy to follow and all of the hardware provided for either flush or floating numbers. Very happy!
Used these to change the way our exterior looked. The floating effect is great.One note - the supplied anchors are terrible. The should not be used. If you drill into stone or brick, get your own anchors. Or do what I did - I had no anchors and did not want to drill larger holes to accommodate the anchors they included so a couple squirts of concrete caulk in each hole and I pressed the numbers in. They have held that way for the last 3 months with no change.
This number 3 is so good that I bought 2 of them. Some might say, "Well, you have two 3s in your address. You HAD to buy two of them." To those people I say, Yes, you're right. But did I really have to buy two of them?
I really like the way these numbers look on our house. They are large, modern, and easy to read from the street.
I can't tell you how pleased we are with these house numbers! The only problem was my fault, I had the brilliant idea to paint them before mounting them on the stone wall and now they blend in with the stone color too much! I should have just left them black. Excellent quality, they feel durable and have a nice weight about them. Phenomenal price! Thank you.
Answer: no