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In 1897 , doctoral student Ernest Duchesne submitted a dissertation , " " ( Contribution to the study of vital competition in micro-organisms : antagonism between molds and microbes ) , the first known scholarly work to consider the therapeutic capabilities of molds resulting from their anti-microbial activity .
 person: Ernest Duchesne
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
 Entities: Ernest Duchesne 
Answer:
 person: Ernest Duchesne