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Larsen also invented a very successful formula for hand cream , a hair restorer , and " Green Giant Udder Ointment " , a petroleum jelly based ointment that was used to heal cow udder s from the chafing of milking machine s , but turned out to be an excellent healer for burns and all wounds .
 Larsen
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Larsen