109532
Employment rose to 1,311 in 1921 , and steadily fell after that until it was closed by the National Coal Board on 17 August 1965 .
 organization: National Coal Board
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: National Coal Board 
Answer:
 organization: National Coal Board