About: http://webisa.webdatacommons.org/247143009

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	By contrast, electromagnetic generators and motors usually require transmissions such as complex gearing systems to efficiently work at low frequencies.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com