<http://schema.org/alternativeHeadline>
"Windows take a toll on birds -- killing up to 1 billion a year in North America. Conservancy bird expert Dave Mehlman gives tips on how you can help stop this deadly problem."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/your-home/at-home/stories/window-glass-silent-bird-killer?page=1>