34494
During the truce of 1849 he qualified as Privatdocent at Kiel , but on the fresh outbreak of war he returned to the troops and was promoted to the rank of senior surgeon .
 Kiel
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Kiel