About: http://webisa.webdatacommons.org/122847760

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	Apparently, they have built the service using almost exclusively open-source technology, such as Asterisk PBX, Debian GNU/Linux and MySQL. Have you had any chance to test the technology?
http://www.w3.org/ns/prov#wasQuotedFrom	linuxquestions.org