About: http://webisa.webdatacommons.org/180399954

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	That is, flat_map is an operator to compose computations which return an Enumerable::Lazy.
http://www.w3.org/ns/prov#wasQuotedFrom	ruby-lang.org