39776
It was broadcast on BBC Radio 1 in the early hours of the morning , for three series from 1997 to 1999 .
 organization: BBC Radio 1
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: BBC Radio 1 
Answer:
 organization: BBC Radio 1