Assertion: ghz | /r/HasProperty | propagated in space
Facets:
value: without artificial guide
type: OTHER
Source sentences:
text: To prevent interference between different users, the artificial generation and use of radio waves is strictly regulated by law, coordinated by an international body called the International Telecommunications Union (ITU), which defines radio waves as "electromagnetic waves of frequencies arbitrarily lower than 3 000 GHz, propagated in space without artificial guide".