<http://schema.org/keywords>
"United States,nuclear program,Luzon,Tehran,European counterparts,news world,Switzerland,London,Iran's nuclear program, video"^^<http://www.w3.org/2001/XMLSchema#string>
<http://uk.reuters.com/video/2015/03/21/time-to-make-hard-decisions-in-iran-nucl?videoId=363587008>