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A few days later , during the course of a dental procedure in Edinburgh , Francis Brodie Imlach became the first person to use chloroform on a patient in a clinical context .
 Edinburgh, Francis Brodie Imlach
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:
 Edinburgh, Francis Brodie Imlach