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The 49 - and 50-star flags were each flown for the first time at Fort McHenry on Independence Day , in 1959 and 1960 respectively .
 Fort McHenry, Independence Day
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:
 Fort McHenry, Independence Day