<http://schema.org/description>
"Ever heard of a little unit called a femtometer? Can you tell us how much you weigh -- in petagrams? We know you can&amp;#039;t, so hurry up and start reading. We have work to do."^^<http://www.w3.org/2001/XMLSchema#string>
<http://science.howstuffworks.com/metric-system3.htm>