<http://schema.org/headline>
"ADHD drug abuse spikes during final exams, trends on Twitter"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.upi.com/Health_News/2013/05/02/ADHD-drug-abuse-spikes-during-final-exams-trends-on-Twitter/UPI-78181367553355/?pvn=1>