About: http://webisa.webdatacommons.org/288001342

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	When the number of transit cars and PWM rectifiers increases, the harmonic currents add linearly and may interfere with telephone and other communication signals along the transit car right of way.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca