Assertion: kelley blue book | /r/CapableOf | serve as standard
Facets:
value: since the 1920s
type: TEMPORAL
Source sentences:
text: Since the 1920s, the Kelley Blue Book has served as a standard within the auto industry in the United States.
text: Since the 1920s, the Kelley Blue Book has served as a standard within the auto industry in the United States.