Assertion: radio wave's data | /r/HasProperty | transmitted over bidirectional 1.7 ghz beams
Facets:
value: between calais
type: LOCATION
value: between uk
type: LOCATION
value: between dover
type: LOCATION
Source sentences:
text: Telephony, telegraph, and facsimile data was transmitted over the bidirectional 1.7 GHz beams 40 miles (64 km) between Dover, UK, and Calais, France.