<http://schema.org/about>
"Free-roaming house cats kill an estimated 4 billion wild animals across the U.S. every year, including birds, mammals, reptiles and amphibians."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/animals/blogs/outdoor-cats-are-prolific-killers-study-finds?page=4&hpt=hp_bn16>