<http://schema.org/headline>
"Khai m\u1EA1c h\u1ED9i ngh\u1ECB V\u1EADt l\u00FD h\u1ECDc qu\u1ED1c t\u1EBF v\u1EDBi ch\u1EE7 \u0111\u1EC1 \u201CTh\u1ED5i bay theo gi\u00F3\u201D "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.vietnamplus.vn/khai-mac-hoi-nghi-vat-ly-hoc-quoc-te-voi-chu-de-thoi-bay-theo-gio/399964.vnp>