<http://schema.org/description>
"Yesterday you talked about hydrogen peroxide, and the day before you talked about Pop Rocks candy. Since we are talking about things that fizz, what about Alka Seltzer? How does it work and why does it fizz?"^^<http://www.w3.org/2001/XMLSchema#string>
<http://science.howstuffworks.com/innovation/science-questions/question116.htm>