<http://schema.org/headline>
"When to use \u2018which\u2019 and when to use \u2018that\u2019"^^<http://www.w3.org/2001/XMLSchema#string>
<http://gulfnews.com/opinion/off-cuff/when-to-use-which-and-when-to-use-that-1.1221767>