4470
dying aged just 29 on 20 April 1918 at Boulogne-sur-Mer , France .
 Boulogne-sur-Mer, France
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Boulogne-sur-Mer, France