About: http://webisa.webdatacommons.org/36692120

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	$index is an observable, so you will need to call it as a function to get its value, when you are processing it in your function.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com