<http://schema.org/keywords>
"\u00E2\u0080\u009Cno such thing as silence: john cage\u00E2\u0080\u0099s \u00E2\u0080\u00984&amp;amp;#39"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.newyorker.com/magazine/2010/10/04/searching-for-silence>