Assertion: radio's service | /r/CapableOf | train their users
Facets:
value: in morse code
type: MANNER
value: in case
type: TEMPORAL
Source sentences:
text: In addition to this, many services that use radio communications still train their users in Morse code in case it is needed for last ditch radio communications, and many radio beacons and similar items may use Morse code to identify themselves.