About: http://webisa.webdatacommons.org/308563207

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	And you do not really need sendmail or postfix to send emails because you just use your isp's smtp server, but you do need some sort of email notifications for your system services such cron, snort, or a script you wrote yourself.
http://www.w3.org/ns/prov#wasQuotedFrom	gentoo.org