Assertion: announcer's station | /r/AtLocation | air
Facets:
Source sentences:
text: Many radio and television stations are on air 24 hours a day.
text: They work in shifts to fill all the time the station is on the air.
text: Many radio and television stations are on air 24 hours a day.
text: Many radio and television stations are on air 24 hours a day.
text: Many radio and television stations are on air 24 hours a day.