20193
Before monogamy was legally imposed in the Meiji period , concubinage was common among the nobility .
 person: Meiji
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: Meiji 
Answer:
 person: Meiji