<http://schema.org/about>
"Who knows what will jump out and save us from running out of fuel and keep the airplanes flying. According to a website on Flight, \"A NASA scientist is confident that within five years commercial aircraft could be powered using a type of biofuel"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/clean-technology/biofuel-for-airplanes-perhaps-sooner-than-we-think.html>