53123
Although ACE was a feasible design , the secrecy surrounding the wartime work at Bletchley Park led to delays in starting the project and he became disillusioned .
 location: Bletchley Park
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: Bletchley Park 
Answer:
 location: Bletchley Park