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Employed as a music copyist and theatre director for the Duke of Mecklenburg-Schwerin at Ludwigslust , Fischer is now credited with the unique Symphony with Eight Obbligato Timpani , formerly attributed to Johann Wilhelm Hertel , court composer at Schwerin .
 location: Ludwigslust; person: Fischer; person: Johann Wilhelm Hertel
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: Ludwigslust; person: Fischer; person: Johann Wilhelm Hertel