About: http://webisa.webdatacommons.org/295385704

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	If you change your operating system, e.g. from Leopard to Snow Leopard (but not from SL to Lion), you need to reinstall Macports from scratch.
http://www.w3.org/ns/prov#wasQuotedFrom	superuser.com