<http://schema.org/about>
"Ever walked along a park path or hiking trail and wondered the name of the tree you were looking at, or whether or not that particular vine was poison ivy or not? Or perhaps you saw some tracks and had no idea what type of animal"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/natural-sciences/mynature-app-makes-you-an-instant-expert-on-the-outdoors.html>