About: http://webisa.webdatacommons.org/439626321

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	However, technically, the PowerPoint you upload to these sites is not in PPT format anymore, indeed they have automatically convert PowerPoint to MP4, FLV or other video formats.
http://www.w3.org/ns/prov#wasQuotedFrom	anddev.org