<http://schema.org/alternativeHeadline>
"Gray wolves have clawed back from the brink 35 years after being exterminated in most U.S. forests. But as they kill more and more livestock, some humans are once again howling for their heads."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/translating-uncle-sam/stories/are-gray-wolves-still-endangered>