79970
Since the target lay out of range for the flying boats , this audacious plan involved a refuelling by submarine at French Frigate Shoals , some north-west of Hawaii , " en route " .
 French Frigate Shoals, Hawaii
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:
 French Frigate Shoals, Hawaii