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: What kind of backer board do you recommend?  I would like to use gypsum board for ease of installation and cost rather than cement backer board.
Document: I just installed this so I will leave more updates to make sure everything is good but the idea is great and the installation isn't bad. I don't think anyone can do it but if you have done some dry wall and tile work it's not bad. Hoping for a water tight seal! Our shower that we just ripped out the installer put silicone around the drain to hold it in place with no bevel and the water leaked for 7 years causing black mold.
All I can say is this is what the tile guy always uses. He was glad I bought one and the shower looks great !
We are currently redoing the bathroom and we are still in the process. The liner was time consuming to put in--- but the fact that it is water proof----- It is peace of mind and I am excited about getting my shower back soon. Happy with it so far
Answer: no