<http://schema.org/headline>
"Ch\u1EC9 s\u1ED1 ch\u1EE9ng kho\u00E1n VN ti\u1EBFp t\u1EE5c gi\u1EA3m"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.bbc.com/vietnamese/business/2013/08/130823_vn_index_fall.shtml>