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: How does this lamp mount to a headboard?
Document: This light is powerful enough to actually add to the lighting of our room, but not too bright to be blinding while reading. Instillation was easy, the wall mount is rock solid, the neck adjustability is perfect. My wife and I love it. If we weren't squeezing every cent to cover college tuition costs, we would have ordered several more.
This runs nice and cool. You are not going to burn yourself when you reach to adjust it. Plenty bright enough.
Purchased 2 of these to wallmount in our den, where the family practices their music. Easy to position and stays in place. Perfectly bright, although note it's a cold white, not a warm white.
Answer: no