<http://schema.org/description>
"How do mammoth cruise ships stay afloat? The principles of density and buoyancy plus lots of modern technology keep today&amp;#039;s cruise ships sailing. Take this quiz to learn more about how cruise ships work."^^<http://www.w3.org/2001/XMLSchema#string>
<http://adventure.howstuffworks.com/cruise-ship-quiz13.htm>