<http://schema.org/alternativeHeadline>
"A teenage gunman opened fire at a Colorado high school on Friday, injuring a student before dying of an apparent self-inflicted gunshot wound. The shooting came a day before the one year anniversary of the Newtown school massacre."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.france24.com/en/20131214-colorado-school-shooting-teacher-usa/>