49438
Hence , in 1850 , when Foucault and Fizeau found by experiment that light travels more slowly in water than in air , in accordance with the wave explanation of refraction and contrary to the corpuscular explanation , the result came as no surprise .
 person: Foucault; person: Fizeau
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: Foucault, Fizeau 
Answer:
 person: Foucault; person: Fizeau