<http://schema.org/headline>
"U.S. airlines resume flights to Mexico City, volcano still rumbles"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.upi.com/Science_News/2013/07/05/US-airlines-resume-flights-to-Mexico-City-volcano-still-rumbles/UPI-42221373062540/?pvn=1>