About: http://webisa.webdatacommons.org/145881642

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	Although its popularity has dropped somewhat in recent years, it remains the dominant mail server on the Internet at large and is the standard mail server installed in many Linux distributions, including Fedora, Red Hat, and Slackware.
http://www.w3.org/ns/prov#wasQuotedFrom	oreilly.com