Instruction: Evaluate the answerability of a question by analyzing the related document, outputting yes if the document contains information addressing the question, and no otherwise.

Input:
Question: Do they flash off and on or flicker?
Document: However, they are lovely in the evening as they flicker and look very real. Would recommend to any candle lover.
I give these candles a 3 stars out of 5 rating because of the three defective ones (bad timer, does not flicker).
I have another set of these lights and for some reason the batteries in them lasted twice as long. Also the flicker of the &#34;flame&#34; is more pronounced in these
I can not believe the bad things I am reading about these candles because I love them! They not only smell good, they look awesome and let off good "candlelight"! I love that they are wax and flicker!
Although the flicker is not a perfect representation of fire, I don't really expect it from a fake flame and believe that this is a reasonable representation. The light is not too bright or off color. In summary I love them and will be buying a second set for myself and one for a friend.
I bought these for my mother as part of her Mother's Day gift and she loves them. They are really neat and smell wonderful. They automatically shut off, as the description states, and they flicker, which is also neat. Acts just like a real candle. Now I want some!
I didn't turn my candles on for a month after I got them and when I did only two of them worked. It's really too late to return them, so I'm stuck with only two candles. The two that work are wonderful. They come on at the same time each day and flicker for 6 hours before turning off automatically.
Ive ordered 3 sets of these, and every one worked perfect, the 6hr timer is awesome, and so far daily use I have not changed batteries in months!! They are ugly if you can see the "flame" but in a container or up higher then eye level these are perfect!! Flicker isn't as real as some more expensive flameless candles I have but after about an hour its just there and you do not notice.
The flicker on these is very mechanical--I swear it's Morse Code. Not natural at all. I had previously purchase Everlasting Glow LED Wax Pillar Candle, Timer, Bisque, Vanilla Scent, Set of 3, Assorted Sizes on Amazon and they are very natural in their flicker. Even though they need the batteries recharged every week and a few dollars more than these, they are superior.
These are FABULOUS!!! The flameless candles are manufactured from genuine wax and give off the scent of vanilla. When lit, usually while my lights are turned down low, the candles actually flicker...just like a real candle. I bought a set as a gift for a girlfriend and bought a second set for myself. Very romantic and safe around the cats. Worried about the cost of batteries?...buy them at the dollar store.Janet
Answer: yes