About: http://webisa.webdatacommons.org/140151319

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	In both cases, the keys are unique--that is, you can not have two elements with the same key, regardless of whether the key is a string or an integer.
http://www.w3.org/ns/prov#wasQuotedFrom	dreamincode.net