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the bridges of a koto , on the other hand , are moved by the player , in the course of a single piece of music .
 instrument agency: bridges, player
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: component whole, NA, instrument agency, member collection, cause effect, entity destination, content container, message topic, product producer, entity origin 
Text: {0} 
 Entity Pairs:  bridges, player 
Answer:
 instrument agency: bridges, player