<http://schema.org/headline>
"\u039E\u03B5\u03BA\u03AF\u03BD\u03B1 \u03B1\u03C0\u03CC \u03C4\u03B1 \u03B2\u03B1\u03C3\u03B9\u03BA\u03AC"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.ntynomai.gr/2015/10/start-from-the-basics/>