271232
Charted , photographed and named by Olaf Holtedahl of the Norwegian expedition 1927-28 , after the floating factory S.S. Ronald , which belonged to the Hektor Whaling Co .
 Olaf Holtedahl
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Olaf Holtedahl