| http://www.w3.org/ns/prov#value | - Basically you are presented with a picture and some hovering icons, and are given a task such as hydrate the athlete, or put all drinks in the ice box or put the golf ball in the hole...A lot harder for a bot to crack (I would guess), reasonably easy for most humans to understand, a lot less annoying that traditional captchas - the biggest down side is that I think it requires you to use a mouse
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