About: http://webisa.webdatacommons.org/316308384

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	Basically, I do not understand that there is a problem _unless_ you want to switch out of a __enter__ or __exit__ method. The body managed by a context manager should be ok.
http://www.w3.org/ns/prov#wasQuotedFrom	stackless.com