About: http://webisa.webdatacommons.org/79693219

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	A common programming problem: identify the URLs in an arbitrary string of text, where by ???arbitrary??? let???s agree we mean something unstructured such as an email message or a tweet.
http://www.w3.org/ns/prov#wasQuotedFrom	blogmarks.net