<http://schema.org/source_blog_url>
"http://blog.oregonlive.com/my-beaverton/"^^<http://www.w3.org/2001/XMLSchema#string>
<http://blog.oregonlive.com/my-beaverton/2010/11/december_beaverton_city_hall_galleries_showcase_local_water_media_photography_and_woodwork.html>