| http://www.w3.org/ns/prov#value | - Here are my 2cents on this topic, I find it ridiculous to pay for any of those devices especially for the portable kind given that using a couple of post it notes, or a small piece of paper , napkin, etc and a little bit of tape, you could cover all the peepholes in a hotel room and one can also use a pen cap, and although they might not be as aesthetically pleasing, why spend $8-15 when one pro
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