<http://schema.org/url>
<http://thenextweb.com/apps/2011/09/15/pistashio-social-bookmarking-to-do-lists-and-read-it-later-in-one/>
<http://thenextweb.com/apps/2011/09/15/pistashio-social-bookmarking-to-do-lists-and-read-it-later-in-one/archive/>