About: http://webisa.webdatacommons.org/248987936

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	So, if there is a need to write a query that can benefit from an index on a date field, then the following (rather convoluted) approach is necessary.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com