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The Hanson Clarinet Company manufactures clarinets using a grenadilla compound reinforced with ebonite , known as " BTR " ( bithermal-reinforced ) grenadilla .
 Hanson Clarinet Company
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Hanson Clarinet Company