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: If the battery dies can you open the door with a key?
Document: We have purchased 4 of these locks to use on rental property. Great price and very reliable lock. We have installed on multiple plex apartment building and  have last up to 2 years before needing to replace the batteries
OK
Answer: no