"COME on guys, let's be serious. If you really want to do something, don't just 'like' this post. Write that you are ready, and we can try to start something." Mustafa Nayem, a Ukrainian journalist, typed those words into his Facebook account on the morning of November 21st 2013. Within an hour his post had garnered 600 comments. That prompted Mr Nayem to write again, calling on his followers to gather later that day on the Maidan square in Kiev. Three months later Ukraine's president, Viktor Yanukovych, was removed.
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