<http://schema.org/query-input>
"required name=search_keyword"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.sdna.gr/politiko-deltio/ellada/article/55816/pseydi-ta-dimosieymata-den-ypirxe-sxedio-gia-epemvasi-sta-afm>