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: How many drops per gallon do I put in.  Lost my direction paper, and it does not say on the bottle.  Please help.
Document: since i just put this in, can't really say whether its really working or not. if this review is still available about 5 years from now, i will let you know if the water preserver actually works. just a FYI, i cleaned out my 50 gallon water drum with a little bleach initially and rinsed over and over again.
I just paid $10 for a 2 ounce bottle of bleach...needless to say I feel kind of foolish...and a little pissed off.
This is a 3rd time re-order product for me. I like the convenience of having a 5 yr. shelf-life for treated water. The one drawback is that there's only one size bottle available--  meant for a 55 gallon barrel, and I have a 30 gallon barrel, so I couldn't empty the entire bottle into the barrel. Instead, I had to  tediously measure a partial amount of Preserver Concentrate. My choice with the unused Preserver is to keep it refrigerated or throw it out.
perfect, had a great expiration date. get prepared for a disaster. store water. at least one gallon per person per day
not much to say except this isn't just bleach. if you need emergency water- get yourself a 55 gallon food safe drum. buy this. add water. write down date. change in 5 years.shipping was super fast.
I have heard from other people (that are educated about preparedness) that this is a'must have' item for storing water safely for several years.My bottle of water preserver came on time and it is lightweight.It should be very useful for my water storage.
It is important to store barrel per instructions (out of direct sunlight, on wood blocks not directly on concrete, not in prolonged contact with other materials, not in rain puddles, mud etc). I also used some none certified 4 gal water jugs; half worked fine, but a few sprung leaks and some did not seal air tight. The water in the defective jugs was foul but possibly usable with a good filter.
I have a well and it is deep and good, but I found out recently just how long it will take to get a new pump put in! I will have 100 gallons of drinking water and a swimming pool full of other water when I get done with this process. That should take me to the point of having enough water to wait until a pump is sent to the well man.
This is great preserver. I like to add it to my 55 gallon emergency water. I have already reviewed this product. Thank you very much.
Water Preserver is an excellent product and delivered on time and  packaged very well. I would highly recommend this product for water storage in the 55 gallon drum
Answer: yes