Assertion: radio wave's frequency | /r/ObjectUse | used by bbc radio
Facets:
value: previously
type: TEMPORAL
Source sentences:
text: BBC Radio 5 Live broadcasts in AM on the medium wave frequencies 693 and 909 kHz nationally, with the frequency 990 kHz used in Cardigan Bay; these frequencies had been utilised by BBC Radio 5 and were used by BBC Radio 2 previously.