156659
He worked on the Rolls-Royce Eagle XVI 16-cylinder X engine and the later Rolls-Royce Kestrel and Buzzard aero engines .
 Rolls-Royce, Rolls-Royce
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Rolls-Royce, Rolls-Royce