281317
Therefore the airport is a place where a number of national and international competitions is held and a lot of pilots from the Czech Republic use the airfield as training base .
 None
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:  
Answer:
 None