10788
The mechanism by which " Y. pestis " is usually transmitted was established in 1898 by Paul-Louis Simond and was found to involve the bites of fleas whose midguts had become obstructed by replicating " Y. pestis " several days after feeding on an infected host .
 person: Paul-Louis Simond
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Paul-Louis Simond