<http://schema.org/description>
"It&amp;#039;s colorless, odorless and definitely life-sustaining, but is it invisible to the naked eye? Not usually. So what&amp;#039;s going on with everyone&amp;#039;s favorite liquid?"^^<http://www.w3.org/2001/XMLSchema#string>
<http://science.howstuffworks.com/environmental/earth/oceanography/invisible-water1.htm>