About: http://webisa.webdatacommons.org/74971218

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	-- This is the same as above, except the variables will be named @x@ and @y@ respectively,
http://www.w3.org/ns/prov#wasQuotedFrom	haskell.org