About: http://webisa.webdatacommons.org/116750075

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 major virtualization companies offer free virtual appliances that contain open source operating systems, such as Ubuntu, Linux, or BSD Unix.
http://www.w3.org/ns/prov#wasQuotedFrom	dummies.com