About: http://webisa.webdatacommons.org/225324560

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	The basic POSIX regular expression syntax is most often encountered in Unix utilities such as grep or sed.
http://www.w3.org/ns/prov#wasQuotedFrom	open-std.org