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At some point the couple learned photography , and in the spring of 1864 Ryū photographed her husband , thereby creating the earliest known photograph by a Japanese woman .
 person: Ryū
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: Ryū 
Answer:
 person: Ryū