Instruction: Given a question and the related document, predict if the question is answerable based on the information provided in the document. Output only yes or no.

Input:
Question: Does this product include the drive chain?
Document: Received it quickly, installation was a breeze and it is very quiet, surprising for a chain drive system! Had a screw drive system at our old house that I loved, tried to save a little cash with this one very happy.
I bought this unit about a year ago and thought it was cool the way the unit programs itself after being installed.Installation was relatively easy if you just follow directions.About a week ago, my grandson jumped up and was swinging from the drive belt and he broke it.
Just like the good old days. The product is well designed, high quality and performs very quietly and smoothly. It also has great features which are not based on gimmicks. Add to this a small company which gives great, personalized service and you have a real winning combination.During installation, a component was inadvertently damaged. A call to the company was an experience from the past.
Instead, there was a quick answer by a friendly local person who quickly decided to send the part on a no charge basis with no questions asked. This was done even though the problem was not due to any product quality or design issue. The part was shipped out on the same day and came quickly.What a breath of fresh air in a world which has become obsessed with cheap, mass produced products and resulting poor mass handling of support and service issues.
This opener is much quieter than the 30 year old unit that it replaced. I have heard quieter units, but this one is chain driven, not belt driven which makes a difference. There is a slight delay in opening or closing the door when using the remote unit which I don't really understand. Sometimes, I have to hit the button twice to get it to work, but it does work and it works well. Overall, a very good garage door opener. I would buy again.
the unit was easy to install with two people. the instructions were easy to follow so why 4 stars. the unit appeared to be well made:  but: the plastic pieces that hold the bulb covers were cheaply made and it's good they sent 5 because one broke when trying to install them. that's probably why they sent an extra. I'm guessing when I have to change the bulbs i'll have another break. except for this I'm satisfied.
The travel up (and down) and down force setting screws have easy access and are very easy to adjust4. The remote control programming button is ON THE BACK OF THE UNIT and easy to find (Genie makes you remove the light cover to get to the button and you can burn yourself on the light bulb)5. The Decko 3 function wall control is great too. Let's you turn on the light and LOCK THE UNIT from operation.The installation again was easy and adjustment quick.
The garage lift works perfectly, was easy to install with clear directions. Love it, would not hesitate to recommend this item to a friend
My car has "Home Link" with built in visor remotes and that was easy to program too.I have converted from the major brands to Decko...check it out if you want to save a few bucks.
I have bought and installed many Genie and Chamberlain 3/4 HP garage door openers on many homes it have owned. They work fine....BUT last time I bought and installed the Decko 3/4 HP. I found the installation on the Decko to be easier than the other 2 brands.1. The safety light sensors are pre-wired and at the sensor so no wire stripping and connecting is needed2.
Answer: yes