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The first lifeboat station , public bath and wash-house , sanitary act , medical officer for health ( William Henry Duncan ) , district nurse , slum clearance , purpose-built ambulance , X-ray medical diagnosis , school of tropical medicine ( Liverpool School of Tropical Medicine ) , motorised municipal fire-engine , free school meal , cancer research centre , and zoonosis research centre all originated in Liverpool .
 William Henry Duncan, Liverpool School of Tropical Medicine, Liverpool
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 William Henry Duncan, Liverpool School of Tropical Medicine, Liverpool