73923
In 1982 , the plan was changed from large simultaneous exchanges to smaller one-way visits using scheduled airlines , but retaining the basic homestay theme , supported by local clubs in the host countries .
 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