About: http://webisa.webdatacommons.org/261876801

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	The superscript symbol ???+??? indicates an a posteriori estimate (e.g., {circumflex over (x)}k + is the estimate of true quantity x at time index k based on all measurements taken up to and including time k).
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca