About: http://webisa.webdatacommons.org/105231930

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Documents such as pdf, doc, xls, ppt, xhtml; images such as bmp, ico, gif, jpg, tif, png; audio such as aac, mp3, wav and wma; video such as wmv, mpg, mov, avi, flv, mp4.It will also convert copious units of measure right on the page.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com