326750
Ohio National Guard Although authorized in 1921 , the 112th Observation Squadron was not organized and federally recognized until 20 June 1927 at Cleveland Hopkins Airport .
 Ohio, Guard, 112th, 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:
 Ohio, Guard, 112th, Squadron