About: http://webisa.webdatacommons.org/39793152

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	He was president in the late 1870s, going from Telegraph and Morse Code to voice communication was a quantum leap.
http://www.w3.org/ns/prov#wasQuotedFrom	grumpyelder.com