311534
As a result of his observations of German and Allied air operations during the early stages of World War II , he recommended significant changes to Air Corps equipment and tactics .
 organization: Corps
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: Corps 
Answer:
 organization: Corps