About: http://webisa.webdatacommons.org/390211173

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	If you have some math books, forget about OCR, the best solution is still to save it as images and then convert images to pdf.
http://www.w3.org/ns/prov#wasQuotedFrom	mobileread.com