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However , smaller aircraft which do not have the necessary range to make a direct crossing of the ocean still routinely use this route , or may alternatively stop in Greenland , typically via Narsarsuaq and Kulusuk or the Azores for refueling .
 Greenland, Narsarsuaq, Kulusuk, Azores
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Greenland, Narsarsuaq, Kulusuk, Azores