<http://schema.org/headline>
"Data: U.S. Internet Advertising to Double to $42 Billion Over Next Four&amp;nbsp;Years"^^<http://www.w3.org/2001/XMLSchema#string>
<https://techcrunch.com/2007/11/07/data-us-internet-advertising-to-double-to-42-billion-over-next-four-years/>