48550
He served in Egypt , Gallipoli , and Mesopotamia from 1915 to 1917 , and was appointed a Lieutenant-Colonel in September 1916 .
 Egypt, Gallipoli, Mesopotamia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Egypt, Gallipoli, Mesopotamia