124173
He was appointed Commander of IX Corps in 1941 and Commander of Salisbury Plain District in 1942 .
 organization: IX 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: IX Corps 
Answer:
 organization: IX Corps