374063
He began his career as a pharmacy apprentice in Celle , and subsequently was an assistant pharmacist in Hamburg , Halle , Wolfenbüttel and Regensburg .
 Celle, Hamburg, Halle, Wolfenbüttel, Regensburg
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Celle, Hamburg, Halle, Wolfenbüttel, Regensburg