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The squadron became part of the Royal Air Force when the Royal Flying Corps merged with the Royal Naval Air Service in 1918 .
 organization: Royal Air Force; organization: Royal Flying Corps; organization: Royal Naval Air Service
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 organization: Royal Air Force; organization: Royal Flying Corps; organization: Royal Naval Air Service