<http://schema.org/alternativeHeadline>
"HD Radio offers AM that sounds like FM, and FM that sounds like CDs. It's free, and it's a big gamble for radio and the auto industry."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/green-tech/transportation/blogs/hd-radio-the-auto-industry-rides-the-hi-fi-highway>