<http://webisa.webdatacommons.org/12738760> <http://www.w3.org/ns/prov#wasQuotedFrom> <infoq.com> . <http://webisa.webdatacommons.org/prov/396274244> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/12738760> . <http://webisa.webdatacommons.org/12738760> <http://www.w3.org/ns/prov#value> "OPTIONS and especially using the Expect header should be considered optional steps." . <http://webisa.webdatacommons.org/12738760> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> .