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Knud Johannes Vogelius Steenstrup ( September 7 , 1842 in Høstemark Mill in Mou , Northern Jutland – April 1 , 1906 ) was a Danish geologist and explorer of Greenland .
 Steenstrup, Danish, Greenland
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Steenstrup, Danish, Greenland