About: http://webisa.webdatacommons.org/33353025

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	First things first: polymorphic types just refer to cases where there is a single declared property type (say, Animal), but multiple concrete subtypes (like Dog and Cat).
http://www.w3.org/ns/prov#wasQuotedFrom	cowtowncoder.com