<http://schema.org/about>
"According to a recent report by the National Fire Protection Association (NFPA), nearly 1 in 5 home fires in 2009 were caused by home heating equipment."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/family/protection-safety/stories/fiery-hazards-of-home-heating>