About: http://webisa.webdatacommons.org/128741528

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	Lee Deforest invents the electronic amplifying tube or triode - this allowed all electronic signals to be amplified improving all electronic communications i.e. telephones and radios.
http://www.w3.org/ns/prov#wasQuotedFrom	about.com