<http://webisa.webdatacommons.org/28128105> <http://www.w3.org/ns/prov#value> ", the 1920s and 1930s were a time of considerable technological innovation." . <http://webisa.webdatacommons.org/prov/171839154> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/28128105> . <http://webisa.webdatacommons.org/28128105> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> . <http://webisa.webdatacommons.org/prov/173279413> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/28128105> . <http://webisa.webdatacommons.org/28128105> <http://www.w3.org/ns/prov#wasQuotedFrom> <abs.gov.au> .