About: http://webisa.webdatacommons.org/451364288

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	Unfortunately, the return types of f1 and f2 are incompatible with the input parameter types of f2 and f3.
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.com