<http://schema.org/headline>
"Study shows astronauts' hearts take on spherical shape in space"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.upi.com/Science_News/2014/04/01/Study-shows-astronauts-hearts-take-on-spherical-shape-in-space/8771396389581/?spt=mps&or=2>