Assertion: electric traffic light | /r/CapableOf | use red and green lights
Facets:
Source sentences:
text: The first electric traffic light using red and green lights was invented in 1912 by Lester Farnsworth Wire, a police officer in Salt Lake City, Utah, according to Family Search.
text: In 1912, Lester Wire of Salt Lake City, Utah invented an electric traffic light that used red and green lights.