<http://schema.org/about>
"Of the 1,357 plant species that once thrived in New York City, only 771 are still found there. The main reasons behind the loss of most plants from the area are human-related: habitat"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/green-food/extinct-plants-of-new-york-city.html>