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He is also a spokesman and endorsee for Jens Ritter Instruments , Hartke Systems , DR Strings and Jim Dunlop Effects .
 organization: Jens Ritter Instruments; organization: DR Strings; organization: Jim Dunlop
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:
 organization: Jens Ritter Instruments; organization: DR Strings; organization: Jim Dunlop