<http://schema.org/description>
"How does an oxygen canister on an airplane or spacecraft work? The ValueJet crash in 1996 was attributed to oxygen canisters that created a fire. And there was a fire on the MIR space station caused by an oxygen canister. How can a fire CREATE oxygen?"^^<http://www.w3.org/2001/XMLSchema#string>
<http://science.howstuffworks.com/transport/flight/modern/question258.htm>