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Visitors are ushered into the premises by red - frocked doormen known as waiters , a reminder of the insurance market 's origins in a coffeehouse in 17th century London .
 17th century, London
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
Answer:
 17th century, London