<http://schema.org/keywords>
"youtube"^^<http://www.w3.org/2001/XMLSchema#string>
<https://techcrunch.com/2013/03/01/youtube-lays-easter-egg-in-tribute-of-harlem-shake-meme/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+Techcrunch+%28TechCrunch%29>