| http://www.w3.org/ns/prov#value | - I used it countless times to give virtual presentations: An audience watching on a projection screen in a remote location could see video of me alongside my Keynote presentation, and I could see video of the audience plus a miniature view of my presentation (and anything else on my screen, such as my email or a Web browser).But then Theater disappeared in the Mavericks version of Messages.In a rec
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