About: http://webisa.webdatacommons.org/341303399

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	In my case, I wanted to check whether a cell is empty or not, this is done by ISBLANK(value), just for the record.
http://www.w3.org/ns/prov#wasQuotedFrom	superuser.com