<http://schema.org/about>
"Regardless of where you live and what kind of tree you plan to bring home, there are two rules everyone should follow to ensure it will last through the holiday"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/your-home/at-home/stories/how-can-i-make-my-christmas-tree-last>