About: http://webisa.webdatacommons.org/445356072

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	Regular expressions form a central role in many programming languages, including Perl and Awk, as well as many familiar UNIX utilities such as grep and sed.
http://www.w3.org/ns/prov#wasQuotedFrom	drdobbs.com