<http://schema.org/description>
"The Petrified Forest National Park has a lot to offer: history, geology, archeology, nature and fun for the whole family. Its petrified wood artifacts are striking evidence of the geological processes that have evolved over millions of years. Take this quiz to learn more about this fascinating national monument."^^<http://www.w3.org/2001/XMLSchema#string>
<http://adventure.howstuffworks.com/petrified-forest-national-park-quiz8.htm>