<http://schema.org/alternativeHeadline>
"The tool that Halliburton lost contains a mixture of beryllium and americium-241, and experts recommend keeping a 25-foot distance if the tool is located."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/wilderness-resources/stories/where-is-halliburtons-radioactive-cylinder>