<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/ImageObject>
<http://www.upi.com/Science_News/2014/04/30/Astronomers-measure-length-of-a-day-on-alien-planet-a-first/9241398881034/?spt=sec&or=sn>