79160
During his studies , he became liable for military service in World War II , but , as a conscientious objector on moral grounds , he enrolled in the Friends ' Ambulance Unit .
 Friends ' Ambulance Unit
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Friends ' Ambulance Unit