<http://schema.org/headline>
"Study: Walnuts may boost sperm quality"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.upi.com/Health_News/2012/08/19/Study-Walnuts-may-boost-sperm-quality/UPI-65721345401070/?spt=mps&or=3>