<http://webisa.webdatacommons.org/137868590> <http://www.w3.org/ns/prov#value> "The rate used to discount pension benefits and other benefits was based on a yield curve developed from market data of approximately 648 Aa-grade non-callable bonds at December 31, 2012." . <http://webisa.webdatacommons.org/prov/437268955> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/137868590> . <http://webisa.webdatacommons.org/137868590> <http://www.w3.org/ns/prov#wasQuotedFrom> <pgecorp.com> . <http://webisa.webdatacommons.org/137868590> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> .