<http://schema.org/alternativeHeadline>
"There have been thousands of oil spills in the Gulf of Mexico in the year since BP's massive oil spill. We shouldn't be surprised."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/wilderness-resources/blogs/one-year-later-more-than-5000-spills-in-the-gulf-of-mexico>