9779
History and words On 25 June 1708 , Bach was appointed organist and chamber musician at the court of the co-reigning Dukes Wilhelm Ernst and Ernst August of Saxe-Weimar .
 person: Bach
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Bach 
Answer:
 person: Bach