About: http://webisa.webdatacommons.org/444788955

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	Not a library, but for the iPhone there is a ton of apps that will tel you how much talk time etc. you have left, maybe you could contact the developers of these apps.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com