About: http://webisa.webdatacommons.org/345302000

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	Starting in 1920 in the United States, locations such as Detroit and Pittsburgh were initial launch points for radio broadcasting (Ackerman, 1945, p. 2).
http://www.w3.org/ns/prov#wasQuotedFrom	ubc.ca