<http://schema.org/headline>
"\u039A\u03BF\u03C3\u03BC\u03AE\u03BC\u03B1\u03C4\u03B1 \u03B3\u03B9\u03B1 \u03C4\u03B1 string \u03C3\u03B1\u03C2"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.ntynomai.gr/2009/06/string-jewels/>