About: http://webisa.webdatacommons.org/250783108

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	Sure, speaker phones and conference calls were not widely used in the 1980s, and mobile phones changed the world of telecommunications significantly.Compare telephones with social media.
http://www.w3.org/ns/prov#wasQuotedFrom	bna.com