Assertion: tuning fork's frequency | /r/HasProperty | chosen in london
Facets:
value: as the worldwide reference frequency
type: MANNER
Source sentences:
text: In contrast, the frequency chosen in London in 1953 as the worldwide reference frequency and which all music today has been tuned to, has come to be defined as ‘disharmonic’ because it has no scientific relationship to the physical laws that govern our universe.