<http://schema.org/about>
"The turboprop aircraft is making a comeback, with sales to one of the only remaining manufacturers quadrupling in 2007 and a continued upsurge expected. With high oil prices, concerns over climate change, and uncertain economic conditions keeping"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/aviation/efficient-modern-turboprop-aircraft-are-making-a-comeback.html>