73525
He joined the Artists Rifles of the West Yorkshire Regiment as a Private and was commissioned and transferred to the Royal Flying Corps on 26 April 1917 .
 Artists Rifles, West Yorkshire Regiment, Royal Flying Corps
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Artists Rifles, West Yorkshire Regiment, Royal Flying Corps