46473
In 1808 the extraordinary refraction of calcite was investigated experimentally , with unprecedented accuracy , by Étienne-Louis Malus , and found to be consistent with Huygens 's spheroid construction , not Newton 's " Rule " .
 person: Étienne-Louis Malus; person: Huygens; person: Newton
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Étienne-Louis Malus, Huygens, Newton 
Answer:
 person: Étienne-Louis Malus; person: Huygens; person: Newton