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Late in 1942 , after six weeks ' operational training in the Levant , Smith entered active service as a pilot officer with No. 237 Squadron in Iran and Iraq .
 No. 237 Squadron
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 No. 237 Squadron